Six prison workers in New York were indicted on murder charges Thursday in connection with the death of an inmate who was beaten while handcuffed.

Syracuse, N.Y. — At least nine prison employees will be charged next week in sealed indictments issued by a grand jury in the death of inmate Robert Brooks, according to a source familiar with the case. The indictments are scheduled to be unsealed in Oneida County Court on Tuesday, the source said.

Prosecutors investigating the death of a handcuffed man who was punched and roughed up by guards in an upstate New York prison were scheduled to appear in court with the announcement of possible criminal charges.

The charges - which the defendants deny - include second-degree murder, manslaughter and tampering with evidence.

Ten former New York corrections employees have been indicted in the death of Robert Brooks, according to an indictment unsealed Thursday.

Ten former prison guards have been indicted in the killing of Robert Brooks, a prisoner who was incarcerated at the Marcy Correctional Facility in Marcy, New York.

Five prison guards have been charged with murder in the death of Robert Brooks, a 43-year-old inmate who was beaten at an upstate New York prison. NBC News' Marquise Francis has the latest on the trial.

A New York grand jury indicted officers involved in the beating death of inmate Robert Brooks Sr. at Marcy Correctional Facility for second degree murder.