A serial rapist who drugged his victims to attack them at his London apartment and used hidden cameras to covertly record women is set to be sentenced. Chao Xu, a 33-year-old Chinese national, used networking parties at his Greenwich apartment to draw in potential victims before plying them with a drink laced with drugs. After his arrest, Met Police detectives found hidden cameras in Xu's bathroom, including one secreted inside an air freshener, and also recovered videos and images showing he was a prolific upskirter on London's transport network.