Man fatally shoots suspected thief after tracking down stolen truck in Texas mall parking lot

A man tracked down his stolen truck to a mall parking lot in San Antonio, Texas.
He confronted the male driver and female passenger at gunpoint and called police.
The driver shot the truck owner, who returned fire in self-defense, killing the suspect.
The truck owner and female passenger sustained gunshot injuries and were hospitalized.
Police deemed the shooting self-defense but advise against taking matters into one's own hands.