DECATUR, Texas (AP) — A former Colorado inmate and white supremacist at the center of a two-state mystery is dead after a high-speed chase and shootout with Texas deputies. Now investigators are trying to piece together whether he killed the chief of Colorado prisons and a pizza delivery man and where he was headed when Texas police stopped him.

Evan Spencer Ebel, 28, is a Colorado parolee with a long record of convictions since 2003 for various crimes including assaulting a prison guard in 2008. He was a member of a white supremacist prison gang called the 211s, a federal law enforcement official told The Associated Press. The official was not authorized to speak publicly about the case and spoke to the AP on condition of anonymity.