MCALESTER, Okla. (AP) — Police are investigating the slaying of a prominent local advocate for transgender rights who was shot and killed on New Year's Day while driving a cab.

Dustin Parker, 25, was found dead early Wednesday in the driver's seat of the cab he was driving in McAlester, Preston Rodgers, a police sergeant in the city about 105 miles (169 kilometers) southeast of Oklahoma City, told The Associated Press. Police are searching for a suspect or anyone with information about the killing, he said.

Rodgers said it's still early in the investigation and police have not determined wheth...