A convicted child molester was found dead inside his cell on Tuesday at San Quentin state prison in Marin County. Inmate Mark Squires’ death is being investigated as a homicide, California Department of Corrections and Rehabilitation officials said.

Authorities with the California Department of Corrections and Rehabilitation are investigating the death of an incarcerated person at San Quentin Rehabilitation Center earlier this week as a homicide,

Prison staffers responded to an alarm at 3:30 p.m. and went to a cell at the San Quentin Rehabilitation Center, where they found Mark Squires, 70, unresponsive and called for medical assistance and first responders, officials with the California Department of Corrections and Rehabilitation said.

The death of a man at San Quentin Rehabilitation Center this week is being investigated as a homicide, officials said Wednesday. Correctional officers at the Marin County facility responded to the cell of incarcerated individuals Mark Squires and Gustavo Lopez at 3:30 p.