An inmate has pleaded guilty to murder in the stabbing death of a guard at a federal prison in Central California.

The U.S Attorney's Office says 48-year-old James Ninete Leon Guerrero, of Guam, entered the plea on Tuesday.

Prosecutors say Guerrero held Officer Jose Rivera down at the U.S. Penitentiary in Atwater in 2008 as another inmate, Jose Cabrera Sablan, stabbed him more than 20 times with an eight-inch shank. The 22-year-old Rivera - a U.S. Navy veteran - was doing a daily headcount when he was attacked.

Guerrero was serving a life prison sentence at the time in connection with an armed bank robbery. Prosecutors say under a plea agreement, he will receive another life term. Sablan is scheduled to go on trial in April.

Distant relatives of England's King Richard III are launching their High Court battle over where to rebury the 15th-century monarch's remains.

The remains of Richard — who was killed in battle in 1485 — were found in a Leicester parking lot.

The government has given Leicester Cathedral in central England permission to rebury the king, but his relatives want him buried in the northern England city of York.

The relatives — under the name the Plantagenet Alliance — are bringing legal action that begins Thursday at the High Court against the government and the University of Leicester.

They claim that the government did not consult widely enough — or consider the wishes of Richard or his descendant — on where the monarch should be reburied.