Midwest City, Okla., police are seeking the public’s help in locating a couple who are wanted on first-degree murder warrants following the slaying of a Sapulpa police lieutenant and another man who was the father of one of the suspects.

Sapulpa police Lt. Trey Pritchard and his cousin, Jeffrey Grafton, both 46, were found dead Saturday night at the Traveler’s Inn Motel, 6821 S.E. 29th St., in Midwest City, the Tulsa World reports.

Grafton’s son, Jonathan Grafton, 22, and Jonathan Grafton’s girlfriend, Daphne Mason, 21, are wanted on first-degree murder warrants in the homicides, Midwest City Police Chief Brandon Clabes said.

Clabes said that police were called to the motel about 10 p.m. Saturday and found both victims dead. He declined to say how they were killed.

He said Pritchard and Jeffrey Grafton had traveled from Sapulpa to repossess a 2000 pickup that had been taken by Jonathan Grafton without permission from his father.

“The pickup had a GPS tracking system on it,” Clabes said. “That’s how they were able to locate it here in Midwest City.”