HOUSTON --Detectives are hoping someone will come forward with information about the murder of a man who was gunned down while driving in north Harris County nearly 20 years ago. Edward Roy Rodriguez was killed during the wee hours of April 20, 1991, according to a statement from the Harris County Sheriff's Office. He was driving his pickup truck in the 10600 block of Veterans Memorial Drive when a sedan pulled up next to him and opened fire. Rodriguez was struck by bullets, and he lost control of his car, which crashed in a vacant lot nearby. He died at the scene. Anyone with information about the suspects in this case is asked to contact Crime Stoppers at 713-222-8477 or the HCSO's Cold Case Unit at 713-967-5911.