The Ohio State Highway Patrol has identified a suspect for the prison guard killed on Christmas Day in Chillicothe. Correction Officer Andrew Lansing died after an inmate assault at Ross Correctional Institution in Chillicothe,

The incident happened on Christmas morning at the Ross Correctional Institution. Officials said Lansing died following an “inmate assault” at the high-security prison in Ross County. In a press conference Friday, ODRC Director Annette Chambers-Smith said that Lansing, a father and husband, had volunteered to work overtime on Christmas.

The Ohio Department of Rehabilitation and Correction said its Chillicothe facility was staffed to standards when one of its correction officers was fatally assaulted.