( KTRS ) An East St. Louis man has pleaded guilty to killing a University of Missouri student after what prosecutors call a botched 2013 drug deal.

26 year-old Deneshion Swope pleaded guilty Tuesday to first-degree murder in Madison County Circuit Court in the shooting death of 21-year-old Jarrett Mosby of Collinsville. Police say Mosby and Swope got into a fight in the village of Madison after Swope had arranged to purchase pot from Mosby. Mosby was a senior majoring in business at the University of Missouri in Columbia.

He had returned home to visit his young son during the winter break. Prosecutors plan to seek a 40-year prison sentence.