Armed Domestic Dispute on North 1st Avenue

Summary: A domestic dispute involving a male suspect armed with a knife occurred at 3112 North 1st Avenue in Tucson, Arizona. The caller reported her brother had a knife and was running southbound, possibly toward a gas station. The suspect was described as wearing a black shirt, black shorts, and a black backpack, and had been drinking. The complainant barricaded herself for safety. The suspect was last seen leaving on Presidio and Windstool, and the caller was able to point him out to responding officers. No injuries were reported.