Four people have been arrested and two of them have been charged with capital murder in the fatal shootings of two Mississippi police officers during a weekend traffic stop in Hattiesburg.

Marvin Banks, 29, and 22-year-old Joanie Calloway have each been charged with two counts of capital murder, while Banks's 26-year-old brother, Curtis Banks, has been charged with two counts of accessory after the fact of capital murder.

A fourth suspect who was allegedly in the car during the fatal traffic stop was arrested Sunday afternoon, reports WDAM. Cornelius Clark, 28, was charged with obstruction of justice.

Dead at their hands following a routine traffic stop, police say, were 25-year-old rookie cop Liquori Tate and decorated K9 officer Benjamin Deen, 34.

Charged: Marvin Banks (left), 29, and his 22-year-old girlfriend Joanie Calloway were charged with two counts of capital murder in the deaths of two Hattiesburg, Mississippi cops shot during a Saturday night traffic stop

'No sir, I didn't do it': Curtis Banks defended his innocence to reporters as he was dragged away by police on Sunday. He was not charged with murder

Marvin Banks' brother, Curtis Banks (left), has been charged with two counts of accessory after the fact of capital murder. Cornelius Clark (right) was arrested on Sunday and charged with obstruction of justice

According to Mississippi Department of Public Safety spokesperson Warren Strain, Marvin Banks also faced other charges.

Strain says officers arrested Marvin and Curtis Banks, and Calloway, all Hattiesburg residents, at different locations overnight without resistance following Saturday night's fatal shooting.

According to WDAM, Marvin Banks was picked up by police at around 1am early Sunday at the Northgate Inn hotel in Hattiesburg.

Hours later, around 3am, his brother Curtis was apprehended at Plantation Place apartment complex. Calloway was also taken into custody shortly after the shooting.

'All three subjects were taken into custody without incident,' Strain said, adding they were expected to face initial court appearances Monday. Because authorities said the three were being held at undisclosed jails in the state, they could not be reached for comment.

Reporters at the scene of Curtis Banks' arrest asked if he killed the officers. 'No sir, I didn't do it,' Banks said as he was led away by police.

Clark was arrested late on Sunday afternoon at an unknown location.

Both Marvin and Curtis Banks reside close to the scene of the shootings in Hattiesburg, where each also has a history of criminal offenses including felony convictions and guns charges.

The father and the rookie: Dead following a routine traffic stop were 25-year-old rookie cop Liquori Tate (right) and decorated K9 officer and father of two Benjamin Deen, 34 (left)

TRAGIC CONNECTION BETWEEN SLAIN COP AND HIS MISSISSIPPI TOWN'S LAST OFFICER KILLED ON DUTY IN 1984 For many in this small community of Hattiesburg the first death of an officer in the line of duty in three decades was a shock. The pain hit particularly close to home for Erica Sherrill Owens. Her mother - Sgt. Jackie Dole Sherrill - was killed in the line of duty in 1984 while trying to serve a warrant on a suspect. When she heard the news of the two officers, Sherrill Owens said, her first thought was that she hoped it was someone she didn't know. 'I know that sounds so selfish because you don't want to hear of any police officer losing their lives. Then when I heard one of the names, my heart just sank because I went to high school with him.' Young love: Deen married his childhood sweetheart Robin and they have two children together She was referring to Deen, who had graduated from Sumrall High School in 1998, one year ahead of Sherrill Owens. 'We were great friends in high school. He married his high school sweetheart and he's got two kids and a great family,' she said. 'It's just heartbreaking.' In addition to being the last officer killed in the city before Saturday night's tragedy, Sherrill was also the first woman officer to serve in Hattiesburg. At a news conference, Hattiesburg Mayor Johnny DuPree asked the community to pull together and support the families of the fallen officers. 'We want to ask everybody to pray for these families. We want everybody to pray for police officers not only here but around the United States,' DuPree said. Tony Mozingo, a local judge, left red roses near the scene of the shooting. 'We all just are heartbroken because we know and work with these officers every day,' said Mozingo, who was accompanied by his wife and two daughters. Deen was a 'consummate law enforcement professional.' The state's chief law enforcement agency, the Mississippi Bureau of Investigation, has taken up the investigation. Miller Rose Mozingo, the youngest daughter of Circuit Judge Tony Mozingo, adjusts a bouquet of Mother's Day roses that the family placed near the site where two Mississippi police were fatally shot the night before, Sunday, May 10, 2015, in Hattiesburg Advertisement

Marvin Banks was also charged with one count of being a felon in possession of a firearm and with grand theft for fleeing in the police cruiser after the shooting, Strain said.

'He absconded with a Hattiesburg police cruiser. He didn't get very far, three or four blocks and then he ditched that vehicle,' Strain said.

Strain said the three suspects were traveling in a vehicle when it was stopped and that shots were fired by 'one individual' from the vehicle.

He declined Sunday morning to say how many shots were fired or who had fired them. He also said any information about the officers' actions or what prompted the stop 'would be premature to talk about' only hours into the investigation.

Tragic: Tate and his fellow officer on the Hattiesburg police force, Officer Benjamin Deen, were shot during a routine traffic stop. They were both pronounced dead shortly after arriving to a local hospital late Saturday

Hattiesburg residents Mills and Pearnell Roberts discovered the two officers after they were shot and called 911

Officer of the year: Benjamin Deen, a decorated K9 officer, was named the Hattiesburg officer of the year in 2012

'At this point a weapon has not been recovered. However, warrants have been issued to search several properties in the Hattiesburg area. We are hopeful and believe that the murder weapon will be recovered,' Strain added. 'At this point, it appears to have been only one weapon.'

The officers were discovered by Tamika Mills and Pearnell Roberts when they drove by.

Mills heard one of the officers say, 'Am I dying? I know I'm dying. Just hand me my walkie-talkie.'

I had been praying it was all just a mistake...my baby Ronald Tate, father or Liquori Tate

'Never in my life have I experienced or seen anything like this expect on TV and to be in the midst of it, it's shocking and heartbreaking,' she told the Clarion-Ledger.

Both officers were transported from the scene of the shooting to Forrest General Hospital and the county coroner confirmed their deaths.

Liquori Tate had not been on the force even a full year when his life was cut tragically short. The 25-year-old had graduated from the police academy in June 2014, reports the Clarion-Ledger, when he gushed on Facebook:

'I graduated the Police Academy today. I am now a Police Officer. I would like to thank God, the Police Academy, the Police Department, my family, friends, and love ones,' he wrote.

Tate grew up in a tough part of Starkville, 150 miles north of Hattiesburg, and decided to become a police officer so he could make a difference in the black community, said Jarvis Thompson, who knew him from childhood in church.

Slain: Liquori Tate was just 25 and a year out of police academy when he was murdered during a Mississippi traffic stop on Saturday night

Local law enforcement officials investigating the scene of a shooting on Saturday in Hattiesburg, Mississippi

Rookie cop: Liquori had not even served on the Hattiesburg police force a full year when he was gunned down Saturday

Distraught: Hattiesburg residents Alberta Harris, center, and Waynetta Theodore, left, and Christiena Preston, console each other as they pay their respects at a makeshift memorial near the site where the cops died

Paying their respects: Donna Nelson (left), from Petal, fixes balloons at the memorial, one of which reads 'RIP Officer Deen & Tate', while Damon Hennis (right) looks deep in thought as he sits beside the adorned fence

Upset: Hennis, a tow truck operator, looked sad as he arrived at the scene of the memorial on Sunday

'He wanted to become an officer because we've seen so much of our peers get killed or end up in jail,' said Thompson, 24, of Starkville. 'He was talking all the time about how he wanted to do better and make the place better.'

Tate's father Ronald Tate posted to Facebook just after learning he'd lost a son.

'WELL LORD, I HAD BEEN PRAYING THAT IT WAS ALL JUST A MISTAKE...MY BABY...I JUST NEED SOME KIND OF MERCY RIGHT NOW...' he wrote.

Condolences and expressions of support poured into Ronald Tate's Facebook feed from around the country.

'So many people are praying for strength for your family....the entire nation is here for you....God Bless. This has to stop,' wrote Ketra Loftin.

'Prayers to you and yours Ronald Tate from the Jenkins family in IL,' Cathy Jenkins wrote.

Big brother: Officer Tate is shown here with his younger siblings are shown in an undated Facebook photo. Family members of two Mississippi cops slain in the line of duty Saturday were shown support on social media from around the world almost immediately

Heartbreaking: Liquori's father posted about his grief on Facebook on Sunday. He received condolences from across the web

'I'm so sorry for your loss! Just wanted to say you and your family are in our thoughts prayers here in East TN,' Amy Elswick Gentry posted.

In response to some of the outreach, Mr. Tate wrote:

'My heart has been ripped out of my chest, and torn into a million pieces. Im in a dizzy haze since 10:11 pm last nite. I just want to be able to move again. Right now, i cant. Thank you so much...'

Deen was Hattiesburg's officer of the year in 2012, a father of two and married to his high school sweetheart, Robin.

Their bodies are being sent to Jackson, which is about 90 miles away, for an autopsy.

Hattiesburg residents Mills and Pearnell Roberts discovered the two officers after they were shot and called 911, according to the Clarion-Ledger.

Mills said: 'As we were coming down Fourth Street, we noticed a bunch of lights.

'As we came on through, [Roberts] told me to turn around because she saw somebody laying on the ground.

Joanie Calloway, 22, (pictured right and left) was in a gold Cadillac Escalade along with the Banks brothers at the time of the murders, police say. She's since been charged with two counts of capital murder

Little brother: Marvin Banks' little brother Curtis (pictured) was not charged with capital murder following the Saturday night slayings. Police, instead, have charged him as an accessory

'So I backed up. That's when we noticed the officer was down.

'I turned and I saw another officer across the street rolling on the ground.

'[Roberts] ran across the street to check on him.

Tate graduated from the police academy in June and Deen was a decorated K9 officer.

HPD officer Deen was a great friend, and a great officer. Deen training with his K9 Tomi. pic.twitter.com/kD6N191rgt — Ryan Moore (@RyanMooreMS) May 10, 2015

Prior to the capture of the suspects, Hattiesburg Mayor Johnny DuPree asked residents to stay inside and pray for the families of the officers while the suspects are being sought.

He said: 'The men and women who go out every day to protect us, the men and woman who go out every day to make sure that we're safe, they were turned on Saturday.

'But the person or persons who did this are not safe in the city of Hattiesburg.'