24 April 2015 From the section England Police do not know whether Palmira Silva knew her attacker A man accused of beheading an 82-year-old woman has pleaded not guilty to murder by reason of insanity. Nicholas Salvador, 25, of Enfield, also pleaded not guilty at the Old Bailey to assault by ABH, by reason of insanity. He is accused of killing Palmira Silva, found dead in a garden in Nightingale Road, Edmonton, north London, in September 2014. Mr Salvador is also charged with assaulting a police officer. Police found Ms Silva's body after being called to the area following reports...