Ōpua stabbing: Police seek mystery witness as murder inquiry continues 11 Jan, 2021 01:10 AM 2 minutes to read Police at the scene of the fatal stabbing at the corner of SH11 and Waimangaro Rd in Ōpua. Photo / Peter de Graaf Police at the scene of the fatal stabbing at the corner of SH11 and Waimangaro Rd in Ōpua. Photo / Peter de Graaf Northern Advocate Police are trying to track down a woman they believe witnessed an altercation in Kawakawa linked to the killing of a man in Ōpua an hour later. Bram Willems, 22, of Ōkaihau, died after being stabbed around 11pm last Thursday on State Highway 11 about 200m south of the Roadrunner Tavern.