Detectives on Tuesday were trying to determine why two people were shot to death around 2 a.m. outside an apartment complex in southwest Dallas.
Police were summoned at 2 a.m. to the double homicide at the front gate of the apartments in the 8100 block of Clarkridge Drive, just south of the intersection of Interstate 20 and Spur 408.
The victims, Kenderick Frost, 28, and Shirlee Jones, 27, were identified by the Dallas County Medical Examiner's Office.
They were found shot to death in the front seat of a 1997 Cadillac, said Sgt. Gene Reyes, homicide detective.
"We don't know what the motive is," Reyes said. "You can only speculate. Car- jacking? A drug transaction? A spurned lover?"
The Cadillac had stopped at a telephone box near the front gate, Reyes said.
"They had already entered the code and were waiting for the gate to open when they were approached and shot multiple times," Reyes said.
A man in the back seat of the car was not hurt, and was being questioned by detectives, Reyes said.
It was unclear what the survivor might have seen because detectives weren't sure if more than one shooter was involved, Reyes said.
Detectives found shell casings at the scene that appeared to be from a handgun, although Reyes declined to describe the caliber.
No weapons were in the Cadillac, but officers did find a small "personal use" quantity of cocaine in the car, Reyes said.
Detectives did not find any video camera surveillance Tuesday morning, Reyes said.