The man who sued Marvin Harrison, contending that the former Colts wide receiver had shot him last year, was in critical condition Tuesday after being shot seven times in Philadelphia. Dwight Dixon, 33, told officers that he believed that Harrison was behind the latest shooting, according to a Philadelphia police source. According to the source, authorities are investigating whether Harrison, currently a free agent, is linked. "Mr. Dixon told officers on scene that he had a dispute with Marvin Harrison," the source said of Tuesday's shooting. "And Marvin Harrison probably hired someone to do this." Dixon was shot in the arm, chest and stomach while sitting in a rental car Tuesday in North Philadelphia after he had just finished breakfast. Witnesses told police that the gunman, wearing a black hooded sweatshirt, white sneakers and blue jeans, was about six-feet tall.