Both of the white supremacist prison gang members whose names surfaced during an investigation into the slaying of Colorado's prisons chief are now behind bars.

Colorado Springs authorities arrested Thomas Guolee, 31, around 5:30 p.m. Thursday, according to El Paso County sheriff's officials. They didn't immediately release circumstances or details of his arrest. He was being held without bond for a parole violation, sheriff's officials said.

Last week, fellow 211 Crew member James Lohr was arrested in Colorado Springs after a short chase. Lohr, 47, is now being held on charges including vehicular eluding. His bond has been set at $250,000.

Investigators say the two aren't suspects in the shooting death of Colorado Department of Corrections head Tom Clements, but their names came up during the investigation. Authorities last week told law-enforcement officers to look out for both men, who had outstanding warrants unrelated to Clements' death.

Parolee Evan Ebel is the only suspect that has been named in the deaths of Clements, who was shot when he answered his front door March 19, and of Nathan Leon, a father of three who was shot while working as a pizza deliveryman March 17. Ebel later died in a shootout with Texas authorities.

Authorities haven't specified how Guolee and Lohr came up in the investigation into Clements' death, but they believe Lohr was in contact with Ebel days before the killings.