Authorities in Colorado are looking for suspects in the shooting death of the director of the state department of corrections, Tom Clements, at his home Tuesday night.

KCNC-TV reported Wednesday morning that Clements was shot while answering the front door of his home in Monument, Colorado, around 8:30 p.m. Tuesday. Though emergency reponders were called in, Clements was pronounced dead at the scene.

"I can hardly believe it, let alone write words to describe it," Gov. John Hickenlooper (D) said in a letter to department employees. "I am so sad. I have never worked with a better person than Tom, and I can’t imagine our team without him."

The station reported that Sheriffs' Department officials in El Paso County, Colorado, used K9 units in their search for suspects near Clements' home.

According to The Associated Press, Clements was appointed by Hickenlooper to head the department in 2011 after working in the Missouri Department of Corrections for more than 30 years. Clements oversaw Colorado's 20 state prisons and juvenile detention system. He is survived by his wife, Lisa, and their two daughters.

Watch KCNC's report, aired Wednesday, below.