A Prince George’s County man pleaded guilty Wednesday to a murder and two rapes he committed in 1990, authorities said.

Thomas Lee Posey, 57, raped and strangled to death a 22-year-old woman and raped two 20-year-old college students, the State’s Attorney’s office said.

Posey, who was convicted in 1992 in a different rape and has been in jail since then, was linked to the 1990 cases through DNA evidence.

Posey will spend life in prison, authorities said.