MODESTO, Calif. -- A composite sketch has been released in the case of a tow truck driver who was killed in May.

According to police, Christopher Sisk saw a man trying to steal his truck on May 3 in the parking lot of Swaid's Market at 800 West Hatch Road. He tried to get inside the vehicle, but the suspect began to drive away. Sisk was eventually run over.

Officers later found the abandoned tow truck later that night.

Police said witnesses described the suspect as a black man in his early 20s, about 6 feet tall, wearing dark clothing and a white bandana or T-shirt on his head.

Anyone with information may call Modesto Police at 209-572-9500 or Crime Stoppers at 209-521-4636. Callers to Crime Stoppers can remain anonymous and may be eligible for a cash reward. Tipsters may also text information to Crime Stoppers by sending a text message to 274637 and by typing "TIP704 along with the message.