Anthony Weiner was dropped off by his brother at a Massachusetts prison Monday to begin serving out his 21-month sentence as a sex offender, just over one year after his pervy text messages to an underage girl destroyed his marriage and career.

The former Democratic congressman and one-time frontrunner for New York City mayor will spend the next two years at Devens Prison in the northern Massachusetts town of Ayer – the same facility where Boston Marathon bomber Dzhokhar Tsarnaev served out his first two years in federal custody.

Weiner had spent his final day of freedom in his Manhattan apartment with his father, Morton, who was spotted at a nearby Starbucks around 11am on Sunday.

And on Monday morning, his younger brother Jason drove the disgraced politician to prison while Weiner's estranged wife Huma Abedin stayed back in New York City to drop off the couple's five-year-old son Jordan at school.

DailyMail.com has confirmed that Weiner was in custody of the federal prison as of Monday morning, where he will spend the next 21 months as an inmate.

It's the end of a long descent for the former political star, whose compulsive sexting habit and repeated scandals wrecked his congressional career, his promising campaign for New York City mayor and his marriage to Hillary Clinton's closest aide.

Weiner's conduct ultimately caught the attention of federal authorities after DailyMail.com first revealed last September Weiner's secret sexting relationship with a 15-year-old girl.

The high school sophomore told DailyMail.com that Weiner asked her to undress for him and engage in sex acts over video chats and sent her explicit messages and photos over several months in 2016 – despite knowing she was underage.

Anthony Weiner was dropped off by his brother Jason at Devens Prison in Massachusetts on Monday to begin serving out his 21-month sentence as a sex offender

Weiner arrived at Devens in order to begin his sentence for sending explicit materials to a 15-year-old girl back in 2016. The disgraced politician spent his final day of freedom with his father, Morton. Pictured: Weiner with his estranged wife and son on Halloween

The 53-year-old will be serving his sentence at Devens Prison (pictured). The facility specializes in sex offenders, who are separated from general population, and Weiner could be placed into the prison's sex offender treatment program

DailyMail.com has confirmed that Weiner was in custody of the federal prison as of Monday morning, where he will spend the next 21 months as an inmate

Weiner was accused of asking the high schooler to strip naked and touch herself for him on Skype. The girl has not been named but has agreed to have her face shown (pictured)

LIFE AT DEVENS FEDERAL PRISON Devens Prison is located in Ayer, a town in northern Massachusetts. It was a former military facility for nearby Fort Devens and houses inmates of all security levels. The federal prison specializes in prisoners with medical conditions and sex offenders. For sex offenders, the prison has a treatment program, which includes daily therapy and group classes. The program requires offenders to follow rules on dress and behavior, including being fully clothed in the presence of staff and consenting to routine searches for pornography. Participants are not allowed to possess suggestive, nude or partially nude pictures – including cut-outs from magazines and drawings. They are not allowed to have sex paraphernalia or materials that are suggestive of sexual violence. For recreation, Devens has intramural sports teams, including basketball, soccer and floor hockey. Devens also has a hobby craft shop and offers art, chess and Bridge classes. With some prisoners allowed to use the internet for outside communication, Devens is considered a relatively pleasant assignment as far as federal prisons go. The facility even has a decent food options, serving coffee cake, pizza, hot dogs, spaghetti and burgers. The federal joint will even have a tasty lineup for Veteran's Day, offering eggs, home fried potatoes and creamed beef biscuits for a breakfast for dinner special. Advertisement

The scandal played an unexpected role in the presidential election one month later, as federal investigators looked into the case.

FBI agents searching Weiner's laptop stumbled over emails from Hillary Clinton's private server, prompting the bureau to reopen its investigation into her email use just 11 days before the election.

Clinton and many of her supporters have blamed that announcement for costing her the presidential race.

Weiner – who pleaded guilty to sending explicit materials to a minor last May – asked a judge to spare him prison time in September because the impact on the election had already turned him into a 'national pariah.'

But the judge disagreed and sentenced him to 21 months in prison.

FMC Devens, which was a former military facility for nearby Fort Devens, houses inmates of all security levels, but specializes in prisoners with medical conditions and sex offenders, and is considered a relatively pleasant assignment as far as federal prisons go.

It offers a number of recreational activities, including Weiner's favorite sport – hockey – as well as a hobby craft shop, a music practice room and cooking classes.

Weiner won't be the only ex-politician at the facility. Former Massachusetts State Rep. John George, Jr. is currently serving out a 70-month sentence at Devens after he pleaded guilty in 2015 to embezzling federal funds.

The prison is also home to Hillary Clinton donor Raj Rajaratnam, the billionaire founder of Galleon Group, who was sentenced to 11 years for a $60 million insider trading scheme in 2009.

Other inmates include Bernie Madoff's brother Peter, Gambino crime family consigliere Frank LoCascio and former New York City cop-turned-gun-smuggler William Masso.

Upon arriving at Devens, Weiner can expect to receive a bodily search and be given prison clothing, according to the Devens prison manual. He will then receive medical and mental health examinations and be placed in 'dormitory'-like housing to attend a four-week orientation program.

Police had started to park outside the prison on Sunday in preparation of the arrival of Weiner. Weiner's brother drove him to prison on Monday morning (pictured)

Jason Weiner, Anthony's younger brother, looked tense as he made the trip to the prison

Weiner is currently being divorced by his wife Huma Abedin, who is a top aide to Hillary Clinton. She was seen returning home to her Manhattan apartment after dropping off the couple's son Jordan, five, on Monday

The prison offers a number of leisure activities, including Weiner's favorite sport – hockey – as well as a hobby craft shop, a music practice room and cooking classes

During the orientation program, Weiner would meet with staff and receive tours of the facility and grounds. He would also sit through classes where he would learn about the prison's rules and its special programs and activities

During the orientation program, Weiner will meet with staff and receive tours of the facility and grounds. He will also sit through classes where he would learn about the prison's rules and its special programs and activities.

As a registered sex offender, Weiner could also be placed into the prison's sex offender treatment program, which includes daily therapy and group classes.

Unlike other prisons that segregate sex offenders for their own safety from other inmates, sex offenders at Devens are separated from the general prison population. But they do receive intensive therapy designed to prevent them from re-offending.

The program requires sex offenders to follow rules on dress and behavior, including being fully clothed in the presence of staff and consenting to routine searches for pornographic contraband.

Participants are not allowed to possess suggestive, nude or partially nude pictures – including cut-outs from magazines and drawings. They also are not allowed to have sex paraphernalia or materials that are suggestive of sexual violence.

During Weiner's free time, he'll be able to participate in the prison's intramural sports teams, including basketball, soccer and floor hockey. Devens also has a hobby craft shop and offers art, chess and Bridge classes.

Although prisoners at Devens are allowed to use the internet for outside communication, Weiner is not likely to have this access because of his conviction for sexting with a teenage girl.

Although prisoners at Devens are allowed to use the internet for outside communication, Weiner is not likely to have this access because of his conviction for sexting with a teenage girl

In one lewd message to the minor, Weiner said: 'I would bust that tight p***y so hard and so often that you would leak and limp for a week' (pictured)

The girl first reached out to Weiner on January 23, 2016, through a Twitter direct message. Although she and Weiner lived in different states, they had both been hit with severe snow storms that night

'Inmates with a documented history of computer abuse (such as having used computers to commit a crime) will not be allowed to participate in the Computer Applications program,' according to the Devens manual.

On September 22, 2016, DailyMail.com reported that Weiner had carried on a months-long relationship with a 15-year-old high school sophomore, during which he pressed her to dress up in school girl outfits and engage in 'rape fantasies.'

The story pieced together the disturbing details from interviews with the teenager and her father, as well as through text messages she exchanged with Weiner.

Messages showed that Weiner was aware the girl was underage shortly after they started messaging.

In the online messages, Weiner, who was 51 at the time, sent bare-chested photos of himself to the underage girl, repeatedly called her 'baby', complimented her body, and told her that he woke up 'hard' after thinking about her, according to copies of the conversations.

In one particularly lewd message, he told the teen: 'I would bust that tight p***y so hard and so often that you would leak and limp for a week.'

The girl first reached out to Weiner on January 23, 2016, through a Twitter direct message. Although she and Weiner lived in different states, they had both been hit with severe snow storms that night.

The messages started out as small talk and during their conversation the girl noticed that Weiner had also found her profile on Facebook and sent her a friend request.

'Where do you go to school?' Weiner asked her.

'[Redacted] High School,' she responded.

'You are kinda sorta gorgeous,' Weiner told her, before asking around midnight why she wasn't with a boyfriend that night.

Weiner shook and clutched a tissue as he said on the day of his sentencing that he had saved his remarks about his son until the end, knowing how emotional he would become. He said that he was finally teaching his son Jordan the right lessons. 'I am living in amends to him,' he said

They began talking on Kik, an instant message app, where Weiner used the screen name 'T Dog.' He sent her photos of himself shirtless, including one photo of him in a hot tub that showed his face. 'Maybe delete that. Hehe,' he wrote after sending it (pictured)

'My dad is overprotective,' said the girl. '[Boyfriends] couldn't be at my house this late.'

The next morning, the girl woke up to find a private message from Weiner on Facebook asking how her night had gone.

'How did you sleep?' the girl asked him.

'Not great. Woke up very, uh, eager,' he replied.

He continued to send her flirtatious messages throughout the day, saying he was 'imagining' her when she was in the shower and saying she must get a lot of male attention at the gym.

At one point, Weiner indicated that he knew the conversation could be a problem.

'[I]f anyone would get the wrong impression we should say goodbye now,' said Weiner. However, he did not stop the conversation.

Instead he told the girl they could talk over other chat applications that would not be monitored by her parents.

They began talking on Kik, an instant message app, where Weiner used the screen name 'T Dog.' He sent her photos of himself shirtless, including one photo of him in a hot tub that showed his face.

'Maybe delete that. Hehe,' he wrote after sending it.

Weiner and the underage girl soon began chatting on Skype, a video messaging application, where she said he encouraged her to undress and conduct a lewd sex act.

Weiner admits in court documents to sending sexts to hundreds of women since 2009 - with this one being revealed. He also spoke of his love for his son, who appeared in a sext (pictured)

The girl said: 'When we would Skype, he would tell me that he was very lonely and that it had been a year since he and his wife [Huma] had sex, and that she really didn't pay him any attention'

'He would tell me to say his name as I was touching myself,' said the girl. 'He would ask me to take my clothes off.'

'When we would Skype, he would tell me that he was very lonely and that it had been a year since he and his wife [Huma] had sex, and that she really didn't pay him any attention,' said the girl.

'We would talk, just chatting for about 30 minutes and it would lead to more sexual things…asking me to undress…he'd comment on my body. He asked me about masturbation, and that kind of thing.'

The girl said Weiner also encouraged her to participate in his 'rape fantasies.'

'He had some rape fantasies. It would just be him showing up at my house when my dad was out of town,' she said. 'And just start undressing me, being forceful, asking me if I want to be dominated, strange questions.'

The girl's father said he was horrified when he learned Weiner had been speaking with his daughter over Skype.

'I couldn't stomach that,' he said. 'That really was the worst part I think, was knowing that inappropriate behavior was available to my daughter by this man.'

After years of repeated sex scandals that destroyed his once-promising political career, it now seemed likely Weiner would face criminal charges for his actions.

Weiner first got involved in politics in 1985, when he moved to Washington, D.C. to work for for Sen. Chuck Schumer, who was a congressman at the time.

The FBI investigation into Weiner continued after the election. On May 19, he pleaded guilty to sending explicit materials to a minor – which carried a sentence of up to 10 years in prison – and agreed to register as a sex offender

The girl added: 'He had some rape fantasies. It would just be him showing up at my house when my dad was out of town. And just start undressing me, being forceful, asking me if I want to be dominated, strange questions'

Six years later, Weiner was elected to the New York City Council at age 27 – making him the city's youngest ever councilman. He was elected to congress in 1998, where he developed a reputation for fiery floor speeches and combative TV appearances.

In 2010, a YouTube video of Weiner denouncing congressional Republicans on the House floor for blocking a 9/11 victims compensation bill went viral. He was a regular guest on Real Time with Bill Maher and Morning Joe, where he would rail against his Republican colleagues.

Weiner also had a reputation as a ladies' man early in his career. One 2001 Vanity Fair article describes how Weiner tried to pick up a young Capitol Hill staffer at a bar by boasting about his political connections and asking her to stop by his office.

But by 2007, Weiner had started dating Abedin, a trusted aide to Hillary Clinton who was 12 years his junior.

Weiner and Abedin quickly cemented themselves as a political power couple and were engaged by 2009. They married in 2010 in a lavish celebration at Oheka Castle on Long Island – a venue that runs $100,000 for the average wedding – with Abedin wearing a custom Oscar de la Renta gown and Bill Clinton officiating the ceremony.

Just one year later the couple's idyllic image would be shattered, when Weiner accidentally posted a photo of his underwear-clad crotch on Twitter while attempting to send it privately to a female college student.

The congressman deleted the photo and initially claimed his account was hacked.

He eventually admitted that he had been sexting with numerous women, after several came forward to say they had exchanged explicit messages and photos with him.

After Weiner's first sexting scandal, he launched a political comeback with his campaign for New York City mayor. He claimed he had cleaned up his act, and quickly took the lead in the polls. Pictured: Weiner and wife Huma Abedin in 2013

But Sydney Leathers, (left and right) a camera model, had steamy online exchanges with Weiner and sunk his mayoral bid when the messages were leaked. She said the news of his prison sentencing was like a 'birthday gift'

Weiner resigned during the controversy, and publicly promised to seek therapy.

Two years later, Weiner launched a political comeback with his campaign for New York City mayor. He claimed he had cleaned up his act, and quickly took the lead in the polls.

But shortly before the primary election, news emerged that he had continued to send explicit text messages and photos to women using the alias 'Carlos Danger,' including a 23-year-old college student named Sydney Leathers. The revelation tanked his campaign and he lost in a landslide.

Despite the recurrent controversies, Weiner still seemed confident he could rehabilitate his political career in the summer of 2016 – even hinting at another future run for mayor.

WEINER'S EXCUSES: I SEXTED BECAUSE I WAS DEDICATED TO MY CONSTITUENTS Anthony Weiner's lawyers submitted more than 200 pages of documents in their bid to keep him out of prison. They called his sexting an 'illness' and said it grew out of his dedication to his constituents as a congressman. 'By 2009, Anthony's national prominence had reached new heights... At the same time, smartphones and the proliferation of social media platforms had begun to transform users' connectivity and frequency of access to online communications. 'Anthony - who prided himself on being accessible to his constituents - moved quickly to capitalize on these new technologies, developing a strong presence on Facebook and Twitter, and responding to and engaging with members of the public who reached out to him. 'Anthony began to exchange texts and other messages with constituents and admirers alike. Some of the admirers were female, validating him not just as a politician, but as a man. It seemed harmless to Anthony...' Advertisement

'The only thing that could make me come out of retirement and run for mayor again is if anyone named Trump ran,' Weiner told Fox 5 in July 2016. 'I would come out of retirement just to beat him like a rented mule, and then I'd turn the keys back over to de Blasio.'

Donald Trump Jr. responded on Twitter: 'Too soon Anthony!!! You probably shouldn't be talking about beating anything ever again.'

Even as Weiner seemed to consider another political run, there were indications he hadn't changed his ways. In August 2016, the New York Post published photos Weiner sent to a Las Vegas woman that showed his crotch in boxers while his young son slept next to him.

Weiner's wife Abedin, who was on the campaign trail with Clinton at the time, released a statement after the incident saying she and Weiner had separated. The two still continued to live together in their Manhattan penthouse, where Weiner took on the full time job of caring for the couple's son while Abedin was on the road with Clinton.

In September 2016, DailyMail.com reached out to Weiner to inform him that it was preparing to publish a story about his sexting relationship with a 15-year-old girl.

Weiner spoke to a DailyMail.com reporter over the phone but declined to talk on the record. He later sent a statement, which was included in the article, that called the girl's allegations 'a hoax.'

That explanation didn't satisfy investigators. After the article was published, the FBI immediately launched an investigation into the allegations.

Agents seized Weiner's laptop, and while searching it discovered 'thousands' of emails between Clinton and Abedin that were potentially relevant to a closed FBI investigation of Clinton's private email server.

On October 28, 2016, FBI director James Comey informed congress that the FBI was seeking a search warrant to read the emails and that it had reopened the Clinton investigation. A federal judge granted the warrant two days later.

When Judge Cote declared his prison sentence on September 25, Weiner bowed his head and put his face in his hands, as he heard the devastating news. After the judge left the bench, he sat in his seat for several minutes, continuing to cry

Although the emails reportedly did not contain any major revelations – and the FBI closed the Clinton case just one week later – the Clinton campaign and poll analysts have blamed Comey's announcement on her election loss.

'I would have won but for Jim Comey's letter on October 28,' said Clinton during her book tour last month. 'I think everyday that goes by, the evidence of that becomes clearer.'

Clinton's poll numbers also took a hit after the announcement. FiveThirtyEight, a poll analysis blog, reported that Clinton had led Trump by 5.9 points on October 28, but her advantage declined to 2.9 percent within the week.

Clinton later said she and Abedin were horrified after hearing the news about Weiner's role in the reopened investigation.

'When we heard this, Huma looked stricken,' wrote Clinton in her new book What Happened. 'Anthony had already caused so much heartache. And now this.'

Abedin told Clinton: 'This man is going to be the death of me,' before bursting into tears.

The FBI investigation into Weiner continued after the election. On May 19, he pleaded guilty to sending explicit materials to a minor – which carried a sentence of up to 10 years in prison – and agreed to register as a sex offender.

The same day, Abedin announced she had filed for divorce from Weiner and would seek custody of the couple's son.

In September, Weiner's lawyers asked the judge for leniency – and no jail time – arguing that he had faced 'extrajudicial punishment' due to the national scorn directed at him after Clinton's election loss.

Huma Abedin is working with Hillary Clinton on her book tour to promote 'What Happened' while husband, Anthony Weiner prepares to head to prison for 21 months on Monday

Weiner is being divorced by his wife Huma Abedin, who wants full custody of their five-year-old son, and is still a top aide to Hillary Clinton. Pictured: The couple in divorce court on September 13

WHAT A SOBBING ANTHONY WEINER TOLD THE COURT 'I am profoundly sorry. The crime I committed was my rock bottom. I live a different and better life today. 'I focus on how I live my new, smaller, healthier life one day at a time. 'I was a very sick man for a very long time but I‘m also responsible for the damage I have done. 'I blamed others. I convinced myself that I wasn’t the problem. 'I have a disease but no excuse. 'I was the adult ... if I had done the right thing, I would not be standing before you today. 'I’m an addict. I victimized a young person who deserved better. I am not asking that I be trusted. 'I ask you for the opportunity on probation to keep my sworn oath.' Advertisement

'[Weiner] has already been punished in a meaningful way by the government, just not in a judicially sanctioned manner,' said a court memo from Weiner's attorneys.

'What was supposed to be a confidential grand jury investigation into a personal offense was leaked by 'law enforcement sources' and then improperly injected into the presidential election by the then-FBI Director.'

'There can be no question that that these improper disclosures exacted significant extrajudicial punishment on Anthony and his family,' the memo continued. 'Anthony might once have been a punch line, but he is now — to many in this country — something far worse, as a result of Secretary Clinton's loss.'

'While Anthony is responsible for many shameful things in his life, neither he nor his wife should have been asked to bear such blame, for a matter entirely unrelated to this case and the conduct precipitating it.'

Weiner says he has been in a serious treatment program for sex addiction and is working hard to stop his destructive behavior.

But he also came clean about his years of compulsive sexting, which he described as a sickness.

He admitted that in early 2016 he was exchanging thousands of messages a month with 'dozens' of women he met online, including at least 1,500 messages with one middle-aged woman over the course of just two months.

The document also acknowledges that he had at least two explicit Skype conversations with the 15-year-old girl in February of 2016, one explicit Snapchat session and one explicit text exchange.

Weiner's attorneys said he continually sexted with women between 2009 and 2016 and did not take therapy seriously at the time, despite the destruction to his political career and his public claims that he was in treatment.

It says his 'self-destructive compulsion' was driven by mental illness, including a 'mixed personality disorder' that was recently diagnosed by a therapist.

Weiner said he was 'profoundly sorry' to the victim and acknowledged, 'I victimized a young person who deserved better

Weiner's memo also describes the 15-year-old girl as a manipulative fame-seeker – writing that she baited Weiner into exchanging sexual messages with her because she wanted to influence the U.S. presidential election.

'[O]ne of her goals in capturing Anthony's bad behavior had been to influence the outcome of the presidential election,' said the memo. '[T]he immediate, improper disclosure that Anthony was under federal investigation and the subsequent improper injection of this case into the presidential election may well have helped [the 15-year-old] realize that apparent ambition.'

The memo also said Weiner had been punished enough by his public humiliation after the news of the scandal broke last year, calling him a 'walking, talking billboard against sexting with a minor, and would be that even without a federal conviction.'

But the judge sided with prosecutors, who had requested between 21 and 27 months in prison.

On September 25, Weiner sobbed in court and dabbed his face with tissues as the 21 month sentence was handed down.

'This is a serious crime that deserves serious punishment,' the judge told Weiner, adding that the victim's motives were 'irrelevant.'

'She is a minor, she is a victim,' said the judge. 'She is entitled to the law's full protection.' Weiner clutched a tissue and shook during the hearing.

'I focus on how I live my new, smaller, healthier life one day at a time. I was a very sick man for a very long time. I have a disease but no excuse,' said Weiner in his statement to the court.

He said he was 'profoundly sorry' to the victim and acknowledged, 'I victimized a young person who deserved better.'

He also described himself as 'an addict' who attends therapy sessions twice a week and is working hard to recover so he can be a better father to his son.