HEMPSTEAD - Cops are searching for the driver who hit and killed a teenager in Hempstead Tuesday night. Cops say Oscar Veliz, 16, was riding his bike on Clinton Street when he was hit by a car. The driver kept going after hitting Veliz and did not stop. Veliz died yesterday at the hospital. Investigators say they're trying to locate a 1998 Toyota Camry. Police are asking anyone with information on the hit-and-run to call Crime Stoppers at 1-800-244-TIPS.