Former NFL star Lawrence Phillips was found dead in his prison cell and officials are investigating his death as a suicide.

According to TMZ Sports, Philips was found at 12:05 AM this morning when staff conducted a routine security check and noticed Lawrence was unresponsive.

Officials say he was transported to an outside hospital where he was pronounced deceased at 1:27 AM. Next-of-kin has been notified.

Philips had been in solitary confinement since April after he was suspected of killing his cellmate, 37-year-old Damion Soward.  He was recently charged with murder.

The 40-year-old — who played for the Rams, Dolphins and 49ers — was initially locked up Kern Valley State Prison in California on a 31-year sentence for numerous convictions, including spousal abuse.

He was a running back at the University of Nebraska in the 1990s before playing in the NFL in a career cut short by off-field incidents and legal trouble.

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