What started as a report of a fight in Garland late Friday night is now a homicide investigation.
Christopher Stevens, 19, is charged with murder. Police said two men tried to rob him on Pebblebrook Drive, shot him with a BB gun, and fled.
According to investigators, Stevens ran after the men, stabbing one of them. David Luciano, 18, died early Saturday after being taken to a hospital.
The other alleged assailant, 22-year-old Jonathan Rojas, was arrested for robbery.