An inmate at a Florida prison gruesomely murdered his cellmate and wore parts of his body as jewelry before any officers new an attack occurred.

According to the Miami Herald, the killed took place at the Columbia Correctional Institution on Thursday morning. The assailant, whose identity remains unknown, strangled his cellmate, who was identified as 58-year-old Larry Mark (pictured above). After Mark was unconscious, the attacked gouged out his eyeballs, wrapped his body in a sheet, and made a necklace out of his ears, which he paraded around the prison’s chow hall.

The murder happened in the prison’s annex — a building separate from the main building where an unrelated armed gang battle took place just hours late. According to prison officials, Columbia houses some of the most violent inmates in the state.

According to his prison records, Mark was serving a life sentence for a murder he committed in Broward County in 1981 when he and a co-defendant crushed the skull of a cab driver over $35 and a wedding ring.

Although the FDC and Florida Department of Law Enforcement are investigating the murder, they have not provided any further details about the attacker.

Two of the prison sources told the Miami Herald that the killer became frustrated with Mark for pestering him. He then began strangling Mark until he became unresponsive. After strangling him, he cut off his ear and gouged out his eyeballs, and put the ear on a string around his neck. The attacker modeled the necklace to several inmates, before morning breakfast in the chow hall, the sources added. He also left the eyeballs in a cup in the cell and told other prisoners that he intended to either eat or drink them later.

There were unconfirmed reports that the killer had recently been transferred to Columbia from Florida State Prison where he had been on Death Row, reported the Herald. Usually, inmates with violent histories or could be a threat to other inmates are housed separately from the rest of the population.