Dallas police say a man shot and killed a 15-year-old after both brandished guns.

Police say they'll refer the death of Frank Vega to a grand jury.

Investigators say 30-year-old Anthony Gray told them he was going home early Friday morning when a teenager in a Cadillac cut him off in the roadway, leading to an argument. Gray says both men pulled out guns.

Police say the teenager didn't fire his weapon.