Derek Locke, 30, of Fort Worth, Texas, was found shot and dead on January 28, 2001. His body was discovered lying on the ground in Cobb Park, with his Chevrolet Blazer pick-up parked nearby.

The death was ruled a homicide. The Fort Worth Police Department lists the case among its cold cases from 2000 to 2009; no arrests have been made and investigators say they have lacked witnesses and conclusive physical evidence to identify a suspect. The family has repeatedly urged anyone with information to come forward.

Anyone who was in or around Cobb Park on January 28, 2001, or who has reliable information about Derek Locke’s movements or his Chevrolet Blazer that day is asked to contact the Fort Worth Police Department.