POLICE have arrested suspects in two serial killer cases. Gauteng police commissioner Sharma Maharaj and Safety and Security Minister Sydney Mufamadi announced the breakthrough on Tuesday, saying a suspect who was arrested in Orlando, Soweto, on rape and hijacking charges has been linked to 14 of the Nasrec serial killings. Maharaj added that Pretoria police also arrested Samuel Sidyno (36) last Wednesday in connection with five decomposing bodies found recently in Capital Park.