From CNN.

The suspected shooter in today’s incident allegedly got into a disagreement with one of the victims the day before, according to a law enforcement official briefed on the case. The suspect arrived at the military base this morning with a 9mm gun he purchased in Florida in May, then followed the victim to a maintenance area and shot the person in the chest, a law enforcement official told CNN. The suspected shooter then shot four others before being tackled, the source said. #CNN #News