Tory Lanez Alleged Prison Attacker Is Inmate Serving Life Sentence For Murder

The guy who allegedly attacked and stabbed Tory Lanez in prison is serving a life sentence for a murder charge … and this wasn’t his first violent incident behind bars.

The California Department of Corrections and Rehabilitation tells TMZ … Tory was allegedly attacked by fellow inmate Santino Casio around 7:20 AM on Monday morning in a housing unit at California Correctional Institution (CCI) in Tehachapi.

We’re told prison staff immediately responded, called 911 and started giving Tory medical aid before transporting him to a hospital for further treatment.

Tory’s camp says he was stabbed 14 times and suffered collapsed lungs.

CDCR says 42-year-old Casio has been placed in restricted housing pending an investigation.

We’re told Casio was sentenced to life with the possibility of parole for second-degree murder, first-degree attempted murder, personal use of a dangerous or deadly weapon, and inflicting great bodily injury.

While incarcerated, CDCR says Casio was sentenced to six years for assaulting a prisoner with a deadly weapon or force likely to cause great bodily injury.

We’re told he was also sentenced to two years for possession/manufacture of a deadly weapon by a prisoner.