Mohamed Bailor Jalloh opened fire in a classroom at Old Dominion University, Virginia, after asking if attendees were there for Reserve Officers Training Corps (ROTC) activities, according to court documents. The attack killed an Army service officer and wounded others before students subdued the gunman. Jalloh, a 36-year-old former Virginia National Guard member and Islamic State supporter on probation, had taken online classes at the university. He was identified as the shooter in an affidavit filed Friday.

Federal prosecutors charged Kenya Chapman with illegally selling the .22 caliber firearm used in the shooting. Investigators traced the weapon to Chapman through phone records showing Jalloh contacted him minutes before the attack. Chapman, who had previously been investigated for illegal gun purchases, sold the gun to Jalloh for $100. As a felon, Jalloh could not legally possess firearms, the Justice Department stated. Chapman's lawyers did not comment.

The shooting, occurring two weeks after U.S. and Israeli strikes on Iran, is among several recent attacks under investigation as terrorism. Authorities executed a search warrant at Chapman's home, finding ammunition matching the crime scene. This incident underscores potential security gaps and the risks associated with illegal gun trafficking, which could impact security companies and drive policy debates on background checks and firearm regulations, affecting businesses in the security and defense sectors.