Juan Covington

ABOUT JUAN COVINGTON

Received three life sentences for murdering three people between 1998 and 2005.

He once worked at Home Depot but was fired for punching a customer in the face.

He shot people he inexplicably deemed threats, and he did so without emotion; he was not motivated by lust or pleasure.

He did not marry but fathered one son with a girlfriend.

He was once featured on ABC's "20/20," hosted by Elizabeth Vargas .