September 8 through 12, investigations were launched on cases involving a caustic substance attack, unlawful filming, two school threats and a shooting in Woodbridge and Dumfries. From two Prince William police press releases:

Malicious Wounding by Caustic Substance – On September 11 at 8:15PM, officers responded to the area of Minnieville Rd and Prince William Pkwy in Woodbridge (22193) to investigate an assault of a Potomac and Rappahannock Transportation Commission (PRTC) bus driver. The driver, a 55-year-old man, reported to police that he was operating a PRTC bus in the above area when he observed an unknown male running alongside the bus. When the bus stopped at the intersection due to traffic, the male began banging on the bus and demanded that the door be opened. When the driver refused, the male stood in front of the bus blocking it from moving. The male then returned to the bus door and kicked out one of the lower windows on the door. The suspect was then able to reach inside and open the door. The suspect then entered the bus, sprayed the driver with an unknown substance causing minor injuries to the driver, and then fled the area on foot. A police K-9 responded and searched for the suspect who was not located. The investigation continues.