A brutal killer who stabbed a man to death in Birmingham may have struck before at a city 'brothel', an investigation has revealed.
Jinmang Zhang, 41, was knifed to death at a flat on February 9 in a chilling incident in which a woman was also threatened, Birmingham Live reported.
His masked killer has not been caught, but police have released CCTV footage of a man they describe as a suspect walking casually away from the scene.
