Police have charged a 17-year-old with first-degree murder in connection with last month’s fatal stabbing at a Hyattsville shopping center, authorities said Wednesday.

Derrell Emmanuel Mason was arrested Monday at his home in Northwest D.C. and charged with first-degree murder in the June 30 slaying of 21-year-old Leonard R. Smith-Matthews, authorities said. The two were among several combatants in a large fight at the University Town Center on American Boulevard, police said.

Smith-Matthews was fatally stabbed during the fight. Four others were injured, but all were treated at the hospital and released, authorities said. It remains unclear what precisely sparked the altercation.