Nassau police say they are escalating their push to find whoever shot and killed Hector Valencia Gomez at a Hempstead McDonald's.  

As News 12 has reported, the recent Hempstead High School graduate was killed last Wednesday in the middle of the day after he was shot from behind.

Nassau Crime Stoppers is now offering a cash reward of up to $5,000 for information that leads to an arrest.

Anyone with information is asked to call 1-800-244-TIPS.