Person of interest (name not released)

Force in Play

Detained early Dec. 14; authorities declined details publicly

Brown's Dec. 13 shooting evolved from a campus lockdown into an extended manhunt. Gunfire killed two students—Ella Cook and Mukhammad Aziz Umurzokov—and wounded nine others; the initially detained suspect was released, and investigators have used residential and vehicle-camera footage to track the shooter's movements.

Updated May 15