(CNN) -- A fourth man was charged Tuesday with murder in the shooting death of University of Memphis football player Taylor Bradford, Memphis police said.



Devin Jefferson, 21, planned the armed robbery of Bradford because he thought the football player was carrying a large amount of cash, police said.



"He was the brain trust on this one, he was the one that got the information that Taylor had cash," Sgt. Vince Higgins said. "Taylor and Jefferson knew each other. They had a girlfriend in common so there was some history there."



Police investigating a car crash on September 30 found Bradford, 21, fatally wounded near the campus residence hall area.



He had apparently gotten into his car after he was shot and drove a short distance before crashing into a tree.



The 5-foot-11, 300-pound defensive lineman from Nashville was taken to Regional Medical Center, where he was pronounced dead.



DaeShawn Tate, 21, Victor Trezevant, 21, and Courtney Washington, 22, have been charged with murder in perpetration of attempted aggravated robbery, Memphis Police Department Director Larry Godwin said Monday.



Homicide investigators developed their case with the help of a citizen's tip and from Crimestoppers, Godwin said.



"It was an attempted robbery, aggravated robbery," he said. "He [Bradford] was targeted because of some information that was out there and the fact that they believed he had some cash, or he had something that they wanted."



Officials at the 21,000-student school said Bradford, a marketing major who lived on campus, was popular with the football team and on the campus. He had transferred from Samford University in Birmingham, Alabama, and was 36 credit hours short of graduation. E-mail to a friend
Who was murdered? Where was Taylor Bradford found What do police say about the crime? Who was found dead on September 30? What happened after the player was shot What is Devin Jefferson charged with?
Taylor Bradford, near the campus residence hall area. "It was an attempted robbery, aggravated robbery," he said. "He [Bradford] was targeted because of some information that was out there and the fact that they believed he had some cash, or he had something that they wanted." Taylor Bradford, drove a short distance murder
question: Who was murdered?, answer: Taylor Bradford, | question: Where was Taylor Bradford found, answer: near the campus residence hall area. | question: What do police say about the crime?, answer: "It was an attempted robbery, aggravated robbery," he said. "He [Bradford] was targeted because of some information that was out there and the fact that they believed he had some cash, or he had something that they wanted." | question: Who was found dead on September 30?, answer: Taylor Bradford, | question: What happened after the player was shot, answer: drove a short distance | question: What is Devin Jefferson charged with?, answer: murder