He was released on parole Jan. 28.
Records show that the vendor operating the electronic monitoring bracelet that Ebel wore noted a "tamper alert" March 14. Corrections officials left a message for Ebel telling him to report in two days and have the bracelet repaired, records show.
The next day, for the first time since his release, Ebel did not call in for his daily phone check-in.
On March 16, he missed his appointment to repair the bracelet. Only on the following day do the records show that a note was made in the corrections system that he failed to show up.
By then, Leon, a father of three, was shot and killed after answering a call for a pizza at a Denver truck stop.
On March 18, parole officers contacted Ebel's father, who said he was concerned his son had fled and gave them permission to search Evan Ebel's apartment. The next afternoon, two parole officers concluded he had fled.
Hours later, Clements answered his doorbell and was fatally shot.
The next morning, still unaware of a connection with the most recent slaying, the state issued a warrant for Ebel's arrest on parole violations.
A sheriff's deputy in rural Texas pulled Ebel over March 21, but he fled. Ebel was killed in the shootout that followed.
Clements, born in St. Louis, worked for 31 years in the Missouri Department of Corrections, both in prison and as a parole officer, before he joined the Colorado Department of Corrections in 2011.
Associated Press writers P. Solomon Banda and Nicholas Riccardi contributed to this report.