On March 6, 2016 in Milwaukee, 36-year-old Phia Vue was one of three people fatally shot in a south-side apartment building. Phia and his 32-year-old wife, Mai K. Vue, lived there with their four children; a neighbor, 40-year-old Jesus R. Manso-Perez, was also killed.

Popp then forced his way into the Vue apartment, rounded up family members, took Phia Vue into a bathroom and shot him. He later shot Mai Vue after moving her and some of the children to another unit. One teenage child escaped through a window and alerted a neighbor who called police. When officers arrived Popp was reportedly firing shots into the sky; he surrendered after running out of ammunition and a rifle and a handgun were recovered. Popp was charged with three counts of first-degree intentional homicide.

Family members believed the killings were racially motivated; no hate crime charge is mentioned. If anyone knew Phia Vue or the family and can share information about the night or their lives, please come forward.