CUMBERLAND, Md. — A Maryland state prison inmate is charged with using a television set to murder his cellmate.

Prosecutors say an Allegany County grand jury indicted 37-year-old Michael Boyer Wednesday on a charge of first-degree murder.

Boyer is accused of bludgeoning 37-year-old Timothy Davis in the head with a TV in their cell at the Western Correctional Institution near Cumberland on Feb. 13.

Boyer was sentenced in 2004 to 50 years for eight counts of robbery with a deadly weapon in Anne Arundel, Harford and Baltimore counties and Baltimore city.

Davis was sentenced in 2007 to 50 years for attempted first-degree murder and drug and handgun convictions in Baltimore city.