Dallas (WBAP/KLIF) – Dallas Police have arrested a murder suspect who gave himself up Saturday night. Arnulfo Canizales turned himself in for the shooting death of Damarcus Beal who was gunned down as he walked toward Canizales’ vehicle in a parking lot near the intersection of Samuell Boulevard and Jim Miller Road. Why Canizales shot Beal is unclear, but he has been arrested for murder, and is in the Dallas County Jail