A killer obsessed with horror films was so twisted that even hardened detectives were shaken by his crime.Nathan Maynard-Ellis, 30, met stranger Julia Rawson in a pub while out with his lover David Leesley, 25.The pair managed to lure her to Maynard-Ellis’ flat, where he murdered her by re-enacting scenes from his favourite sickening movies. Julia, 42, was battered with a rolling pin and her corpse was chopped into 12 pieces with the help of Leesley.