Kristopher Pratt apologized to the family of the 20-year-old Chicago native before Washtenaw County trial Judge Donald Shelton issued the sentence Tuesday.

Pratt pleaded guilty to second-degree murder as part of a deal that called on the 20-year-old Detroit man to testify against 21-year-old co-defendant Ed Thomas. A jury acquitted Thomas of murder and other charges on July 28.

Pratt says he shot Reed and that Thomas participated in the Oct. 18, 2013, robbery at an off-campus apartment in Ypsilanti.