Shocking video shows man being murdered at a gas station in a dispute over an engagement ring - including NINE point-blank shots after he was already on the ground A man and his sister have been arrested and charged with murder over the brutal slaying of a father-of-four at an Alabama gas station, which was captured on video. Adarius Elon Williams, 28, was shot multiple times, including nine point-blank as he lay dying on the ground at the Citgo station in Farfield on April 8, with the footage of the shooting obtained this week by AL.com. Police say that Vincent Washington, 25, and Barbara Washington, 31, convinced a friend to drive them to the gas station to meet Williams, who wanted to get back the engagement ring he gave to Barbara, his former fiancee. Once there, Vincent Washington got out of the car with a towel wrapped around his head and has a short argument with Williams, before drawing his gun. Scroll down for video +7 Brutal killing: This is the moment the man with a towel wrapped around his head - believed to be Vincent Williams - pulls a gun on Adarius Williams at the gas station and repeatedly shoots him +7 Surveillance footage helped capture two siblings police believe are responsible for Williams’ murder, Barbara and Vincent Washington Even once the victim was on the ground, the gunman fired another nine shots, before getting back in the car Williams fell to the ground on his back, and Washington stood over him and fired nine more shots. The friend that drove the brother and sister to the gas station said she did not know what the two had planned at the time, and said they offered to pay for her gas if she drove them. The woman told investigators that when Washington started wrapping the towel on his head she said she wanted to leave, but he threatened to kill her. According to court records, Vincent Washington told her: '(Expletive), if you drive off I'll shoot you in the back of the head.' After the shooting, Washington got back in the car - a white Nissan - and drove off. However, not long after the shooting, Washington arrived at a hospital in Bessemer with gunshot wounds to the stomach and hand. Officials say he was dropped off in a white car. +7 +7 Vincent Washington, 25, and Barbara Washington, 31, are charged with the murder of Adarius Williams +7 +7 Killed: Adarius Elon Williams, 28, shot dead at the station in Fairfield, Alabama while meeting his former fiancee, Barbara Washington, 31, and her brother Vincent Washington, 25 Police have not said who shot Washington. Then at about 8 p.m., Fairfield police spotted the white Altima and stopped the vehicle. Barbara Washington and another woman were in the vehicle and were taken into custody, however the second woman wasn't charged. Police say Barbara Washington took the gun used in the shooting to a friends house and hid it. Her and her brother are charged with murder in Williams' death. Additionally, Vincent Washington is charged with first-degree kidnapping because the woman who drove him to the gas station said she wanted to leave and he threatened to kill her. +7 Scene: Adarius Williams who was left on the ground after he was shot to death at this Citgo gas station in Fairfield last month The bond if Vincent Washington was raised to $1 million, while the bond for Barbara Washington was set at $60,000. The siblings lost their sister in an unrelated shooting in the same area last year. Bill Veitch, the district attorney in Jefferson County's Bessemer Cutoff, said the murder of Adarius Williams highlights a greater problem. 'Any of us could have been out there at those gas pumps that day,'' Veitch told AL.com. 'This war on violence cannot be won unless the communities unite, tear down the walls that have built between us and see, hear and report.' 'It's going to take a great deal of individual courage to become involved in this struggle.' 'Join with me and our law enforcement officers, our churches, our judges, to fight these heartless hoodlums. This video is graphic evidence of how great this epidemic has become.'