Jeffrey E. Sheffield was a 23-year-old man living in Denver whose life ended on May 20, 1987, when he was shot in the head at close range inside his home. He shared the apartment with his 22-year-old roommate Mitchell Gonzales; both men were killed after an acquaintance, Michael Tenneson, spent the evening with them. Investigators later determined Tenneson used the same small-caliber handgun he had carried in Wisconsin and then stole the victims’ cash, pawned their stereo, and took Jeffrey’s car to leave Denver.

Tenneson was tied to the Denver killings after the stolen vehicle led investigators to an alias and ultimately to his identity; he admitted the Wisconsin murders and acknowledged the Denver killings. In 1988 a Denver jury convicted him of two counts of first-degree murder and related felonies. He received two life terms plus additional decades, and Jeffrey was buried in Coal Creek Cemetery in Louisville, Colorado.