Updated

KNOXVILLE, Tenn. -- A young man has admitted killing an Alabama woman and accepted a plea deal that requires him to spend 51 years in prison.

The Knoxville News Sentinel reports that Valentino Vasquez Miranda, a 20-year-old Mexican who is in the U.S. illegally and does not speak English, signed the deal Thursday and is awaiting a judge's approval.

Miranda was working at a Knoxville Days Inn in September 2008 when guest Jennifer Hampton of Waterloo, Ala., disappeared. Police believe Miranda used a master key to enter the room.

The 21-year-old former homecoming queen was raped and strangled and her nude body was found in a lake several days later.