A 20-year-old District man was sentenced to 60 years in prison Friday for killing a 17-year-old honor roll student and injuring another teenager in November 2010, authorities said.

A D.C. Superior Court jury found Kwan Kearney guilty of first-degree murder while armed, assault with intent to kill while armed, aggravated assault while armed and a firearms offense in December.

Joseph Sharps Jr., an athlete at Spingarn High School, was shot and killed in Northeast D.C. while walking to buy cigarettes with a friend, according to the U.S. Attorney’s Office.

Kearney bumped Sharps, accused him of pretending to reach for a gun, then shot him three times — and the other teenager once — with a Colt .38-caliber revolver, according to authorities.

Read more: The Post’s crime coverage