Police say Trnka died as a result of a gun shot wound to the upper torso.
Trnka lived in the Pencader Village neighborhood.
He was found just before 10:00 Tuesday night in the rear parking area of the BJ's Wholesale store at 10 Pencader Plaza on Route 72 in Newark.
The motor of the Chevrolet Cavalier he was in was still running.
Investigators are asking that anyone who saw anything unusual in the parking lot on Tuesday night call state police.
You can get the latest crime statistics from the Philadelphia Police by CLICKING HERE for the force's crime data mapping site.
CLICK HERE to follow Action News on Twitter
CLICK HERE to get Action News on your website
CLICK HERE to find Action News on Facebook
