A District man was sentenced today to 35 years in prison for the November 2010 killing of a teenager, the U.S. Attorney announced today.

Jeremy Risper, 22, of the District, was convicted of of first-degree murder while armed and other related weapons offenses in March for the death of 19-year-old Jamal Wilson on the unit block of P Street NW, according to the U.S. Attorney’s office.

Kwan Kearney, was convicted of the same charges and was sentenced to 45 years in prison last month. The U.S. Attorney said that Kearney had fired the fatal shot.

Officials said the murder stemmed from a dispute between Kearney and Wilson. Risper, officials said, was not involved in the dispute but armed himself and helped Kearney chase after Wilson before Wilson was shot.