Witnesses found the body of 45-year-old David Watson inside his red truck crashed off S. 54th Street around 3:10 a.m., police said.
Investigators were able to determine that Watson had been in a confrontation with two men outside a nearby Chevron station's convenience store. One of the men pulled out a gun and shot Watson, who tried to drive away before crashing into the park.
The two men appear to be in their late teens or early 20's, white or possibly light skinned black or Hispanic, with medium builds.
Detectives are looking for any information on their identities.