There is no evidence to prove that either of these claims are true

They also suggest he could have been behind the DNC email hack

Reddit users have claimed he was on the way to the FBI when he was shot

But his family say his cell phone, watch and wallet were found on his body

The mother of a Democratic National Committee staffer shot dead in Washington D.C. last month is appealing for help to catch his killer.

Seth Conrad Rich, 27, was gunned down in the affluent Bloomingdale neighborhood three weeks ago while he was on the phone to his girlfriend.

So far, police have uncovered no clues towards solving his murder despite offering a $25,000 reward.

Today Rich's mother Mary made a desperate appeal to the public for anyone with any information to come forward, NBC Washington reports.

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Mary Rich (pictured) the mother of a Democratic National Committee staffer shot dead in Washington D.C. last month is appealing for help to catch his killer

Police are also appealing for information in the murder of popular Democratic National Committee staffer Seth Rich (pictured)

During an emotional press conference, where Mary Rich fought to keep back tears, she said: 'We want to find out who killed our son.'

She appealed 'if you saw anyone in the area... if you know of people that came home after 4.30am in the early morning' on July 11 to report it to the police.

'Next time something like this happens, it might be someone you love, ' she warned.

'The only thing I can say as a mother is it warms my heart that he lived such a great life, even though it was cut short,' she added. 'I can always hold on to that.'

D.C. police chief Cathy Lanier said that Rich may have been killed in an attempted robbery but his family insist nothing was taken from him.

Today the chief also asked appealed for anyone with information to come forward.

The trail seems to have gone cold after the DNC staffer was killed on July 11.

Rich's body was found covered in bruises on the 2100 block of Flagler Place NW, but he still had his watch, cell phone and wallet on him.

A mother's hearbreak. Mary Rich asks for help finding killers of her son Seth #sethrich @nbcwashington pic.twitter.com/g2sZg5ugfr — Jackie Bensen (@jackiebensen) August 4, 2016

Internet sleuths are now coming up their own stories about how Rich died while police are offering $25,000 for anyone with information about the death

Police looked on outside the synagogue as Rich's casket was put into the hearse following his funeral on Wednesday

Mourners walk beside Rich's casket as it's wheeled out of the synagogue following a funeral on Wednesday

Flowers are left on the street near where Rich's bruised body was found

A police report seen by DailyMail.com also states the circumstances surrounding Rich's homicide are 'unknown'.

The mystery surrounding his death has sparked a flurry of theories posted online, including claims that he was on his way to speak to the FBI when he was shot.

There have also been suggestions he fed Wikileaks the 3,000 DNC emails that were released at the start of the party's convention last week.

Reddit user The_Donald also constructed a timeline that links Rich to the Clintons, as pointed out by Heat Street.

He then says Rich developed a relationship with environmentalists supporting Bernie Sanders.

They then suggest this relationship was somehow connected to his death.

There is no evidence to suggest any of these claims are true.

Cops said he may have been the victim of an attempted robbery, but his family insist the killers didn't take anything from him

One of his roommates said Seth was likely walking home from his girlfriend's house when he was shot. Rich had rented an apartment with three roommates

DailyMail.com has contacted the FBI for comment.

Julian Assange suggested the DNC leak may have been the work of an insider.

But he told DemocracyNow he didn't know their identity, and wouldn't reveal if he did.

In an interview with Britain's ITV, he also suggested that anyone within the Democratic organization could have had access to the trove of emails.

Rich was killed on July 11, two days after he appealed on Facebook to end gun violence.

He wrote: 'I reiterate back to people stop hating each other. Too much pain to process. We have to be better and defend each other more true.

Rich's father, Joel Rich, 68, here with Seth's mother Mary, told Daily Mail Online that his son wanted to make a difference in the world with his work in politics

'A life is exponentially valuable. I have family and friends on both sides of the law. Please, stop killing each other.'

His death came after a spate of robberies in the neighborhood and DC police are now investigating if the murder is connected to those.

According to Fox 5, just an hour before the shooting there was a violent robbery in the 900 block on N Street, where police said three suspects pistol whipped, beat, kicked and robbed three people.

There were no witnesses to Rich's shooting, police said.

The attack took place across the street from a convenience store on the 2100 block of Flagler Place NW, three blocks away from Howard University Hospital.

It was not far from where Rich lived in a brownstone with three or four roommates, according to the Washington Post.

Those who knew him said Rich (pictured center) liked to stay up late either due to a busy work schedule or to socialize

Colleagues have paid tribute to Seth's infectious smile and strong work ethic. Rich, an avid Packers fan, is pictured above at an NFL game in his teams colors

One of his roommates told the Post that Rich was likely walking home from his girlfriend's house at the time.

His father, Joel Rich, 68, told Daily Mail Online: 'He was a 27-year-old who wanted to make a difference. That's part of the reason he went into his line of work, helping with the political process.

'He had worked for candidates whose vision he felt was going to help the country get better.

'He was working on that now, and whether he ever wanted to run, I would not say no. He wanted to stay involved and he wanted to make a difference.

'What we're feeling is that his vision is going to be unfulfilled. He was so capable, he would have been able to make a difference, I think.'

Describing himself on LinkedIn, Rich wrote: 'I have an enormous interest in public service and working towards making the world a better place.'

Rich was killed on July 11, two days after he appealed on Facebook to end gun violence

Rich graduated with a BA in political science from Nebraska's Creighton University in 2011.

While studying, he worked for the US Census Bureau and the Nebraska Democratic Party, and interned for Senator Ben Nelson.

His first job out of college was as a research associate for the opinion research firm Greenberg Quinlan Rosner.

In 2014, he took up his position at the DNC, which starts its all-important convention on July 25.

Former DNC Chairwoman Debbie Wasserman Schultz paid tribute to Rich the day after his death.

'Our hearts are broken with the loss of one of our DNC family members over the weekend,' she said in a statement.

'Seth Rich was a dedicated, selfless public servant who worked tirelessly to protect the most sacred right we share as Americans — the right to vote. He saw the great potential of our nation and believed that, together, we can make the world a better place.

'He was a joy to have as a member of our team, and his talents, intelligence and enthusiasm will be deeply missed by the many friends, colleagues and coworkers who worked by his side in service to the highest ideals of our democracy.'

Rich lived in a brownstone with three or four roommates. It was close to where he was shot

Rich grew up in Omaha, where his family played a strong role in the Beth El Synagogue.

His grandfather was a founding member of the synagogue and his father was head of the congregation until recently.

Rich studied Hebrew at the synagogue, and traveled to Israel two years ago. His teacher paid tribute to Rich on Facebook, calling him 'a dynamic young man who loved his work at the DNC.'

The 27-year-old was described by friends as quiet, soft-spoken and focused on his work but with a comic streak.

'On the Fourth of July he wore a full American flag outfit,' one friend, who did not wish to be identified, said. 'If he went to a Redskins game he would wear entirely red and gold.

'He was a big Packers fan and when they played he would wear a 'Cheesehead'. Although he was quiet with his words, in that way, he was outgoing.'

Those who knew him said Rich liked to stay up late either due to a busy work schedule or to socialize.

The Metropolitan Police Department offers up to a $25,000 reward for information leading to an arrest and conviction.