One of his more serious offenses occurred on September 17, 2005, when he threatened to kill a female guard, saying he would "kill her if he saw her on the streets and that he would make her beg for her life," according to the records.
Over a two-year period also beginning in 2005, he threatened to kill two other prison guards as well as an inmate.
In 2006, guards confiscated a letter Ebel wrote to a friend, another inmate at another prison, lamenting prison guards revoking his telephone privileges or turning off the water in the showers.
"I just fantasize about catching them out on the bricks and subjecting them to vicious torture and eventual murder, and that seems to get me through the days with a good degree of my sanity remaining intact," he wrote.
He signed it "Evil Evan Ebel Himself," adding an exclamation point with a swastika.
A year later, in late 2007, Ebel wiggled out of his restraints and punched a prison guard in the face, according to the records.
As part of a deal, he pleaded guilty in 2008 to assaulting a prison guard. The judge added four years to his sentence, which Ebel protested in open court.
"I just think four years is a little stiff, you know. By the time I get out, I'll be 33," he said, according to court transcripts.
But somewhere between the judge's verbal sentence and a court clerk entering it into a computer, the order that Ebel serve the four additional years at the end of his current term rather than concurrent with it got lost.
On January 28, at the age of 28, Ebel was released wearing an ankle monitor.
Every day, for 45 days, Ebel checked in with parole officers, one of a handful of conditions mandated by his release, said Timothy Hand, director of the state's Department of Corrections.
He also followed the other conditions. He got a job. He found a place to live. He didn't violate an 8 p.m. to 6 a.m. curfew. He tested negative for drugs. He attended a drug treatment program.
Then, on March 14, something went wrong. The "tamper alert" on his ankle monitor went off, according to parole records. Initially, the ankle monitor was listed "for repair" and a message was left for Ebel to make arrangements to get it fixed.
He never called back.
Three days later, on March 17, contractors overseeing the ankle monitoring system notified parole officials that Ebel failed to "make contact."
It was the same day Leon left Domino's Pizza in Denver to make a delivery and never returned. His body was found later that day in a field near the suburban city of Golden, according to authorities.
On March 19, parole officials went to Ebel's apartment to look for him.
According to parole documents, it was evident from the state of the apartment that he left quickly or went into hiding to avoid arrest.
That day, parole officials began the paperwork to return Ebel to prison.
That night, Clements was gunned down as he answered the door of his home.
Shootout in Texas
A day later, on March 20, Ebel was speeding through Montague County, Texas, near the Oklahoma state line, about 700 miles from Monument.
Deputy James Boyd tried to pull the car over for a traffic violation. The 1991 Cadillac Seville had two different license plates, according to an affidavit filed by the Texas Department of Public Safety's Ranger Division.
The Cadillac had barely come to a stop when Ebel opened fire.