DECATUR, Texas — A paroled Colorado inmate who may be linked to the slaying of the state's prison chief led Texas deputies on a 100 mph car chase that ended Thursday after he crashed into a semi and then opened fire before being shot down by his pursuers.

Evan Spencer Ebel, 28, was driving a Cadillac in Texas that matched the description of the vehicle seen leaving the home of prisons chief Tom Clements around the time Clements was shot. Ebel was hooked up to equipment for organ harvesting and authorities say he is not expected to survive.

Colorado investigators immediately headed to Texas to determine whether Ebel was linked to Clements' slaying and the killing Sunday of Nathan Leon, a Denver pizza delivery man. Police in Colorado would only say the connection is strong but would not elaborate or say if they believe Ebel killed Clements and Leon.

The killing of Clements, 28, shocked his quiet neighborhood in Monument, a town of rolling hills north of Colorado Springs, for its brutality: He answered the door Tuesday evening and was gunned down. Authorities wouldn't say if they thought the attack was related to his job, and all Clements' recent public activities and cases were scrutinized.

The Texas car chase started when a sheriff's deputy in Montague County, James Boyd, tried to pull over the Cadillac about 11 a.m. Thursday, authorities there said. They wouldn't say exactly why he was stopped, but called it routine.

The driver opened fire on Boyd, wounding him, Wise County Sheriff David Walker said. He then fled south before crashing into a semi as he tried to elude his pursuers.