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DENVER — Benjamin Davis, founder of 211 Crew, a white supremacist prison gang, is dead, the Colorado Department of Corrections said Sunday.

The death is being investigated as a suicide, officials said.

Colorado prisons chief Tom Clements was killed by a member of the gang in 2013, the Texas Rangers found.

The Rangers’ investigation found Evan Ebel killed Clements and Commerce City father Nathan Leon in March 2013. Investigators concluded Clements’ death was “ordered by the hierarchy of the 211 prison gang.”

Ebel was killed in a shootout with Texas deputies two days after Clements was gunned down in front of his home in Monument.

Clements earned widespread recognition not only for prison reforms but for a crackdown on prison gangs, including the 211 Crew.

Leaders of the 211 Crew also put out a “hit” against an El Paso County judge, sending him into hiding, as retaliation for his signing of warrants into the murder investigation.

Davis was convicted of robbery, assault and racketeering, and had been sentenced to 108 years in prison.

“Nobody is safe from him, either people in the Department of Corrections or people walking on the street,” district judge William Robbins said before sentencing Davis on the racketeering charge in 2013.