'The Ripper ' : Duwayne Henry , pictured , was jailed for life at Blackfriars Crown Court yesterday . A serial rapist who called himself 'the Ripper ' was caught after he attacked a woman in a home-made 'torture chamber ' . Duwayne Henry selected his victims using an online escort agency and lured them to his flat in Hackney , east London , where they were threatened with knives and repeatedly raped . Police found a knives , a circular saw and a hedge trimmer laid out on the floor of his bedroom when they searched his home . Officers believe he intended to use these weapons on his final victim , but was interrupted by a passer-by who heard her screams . The mystery hero has never been identified . Henry was jailed for life with a minimum sentence of 12 and a half years at Blackfriars Crown Court yesterday . The 34-year-old targeted at least three prostitutes during his 14-month spree , believing their trade meant they were less likely to report his crimes , police said . In the first known assault , which took place in early 2013 , Henry repeatedly raped his victim in a brutal three-hour attack before taking a photo of the woman 's driving licence . He told her he would use the details to find her and kill her if she went to the police . In the second known attack , in April 2013 , Henry gagged the victim with duct-tape before and raped her at knife-point . He then forced her to wash his bedsheets before raping her again on the floor . His final attack took place in February 2014 , when Henry booked an escort to meet him outside the flats where he lived . He held a knife to his victim 's eye and led her to his bedroom , described by police as a 'torture chamber ' , where he had laid out a circular saw , seven knives and a hedge trimmer . One of these items was plugged into the mains . As soon as she entered the room , Henry held a knife to the woman 's eye . He pushed her over and told her she was going to die . The woman was gagged , tied up , and raped . The rapist was interrupted when a man , alerted by the woman 's screams , appeared in the doorway of Henry 's bedroom . He untied the woman , who phoned the police . 'Torture chamber ' : Henry selected his victims using an online escort agency before luring them to his flat in Hackney , east London , pictured . There , the women were threatened , tied up and repeatedly raped . The victim later told officers that Henry threatened her and said : ' I 'm invisible , I 'm the Ripper ' . Officers from the Metropolitan Police found one victim 's phone in his flat and managed to track down a second victim . The mystery 'good Samaritan ' has never been identified , despite a police appeal last year . Detective Inspector Tony Lynes said : 'Henry 's attacks were thoroughly planned . 'He controlled the environment where the attacks took place , avoiding the risk of being disturbed . 'Luckily he did not take into account the courage of his victims or the tenacity of the detectives investigating this case and I am pleased that today he can look forward to a substantial prison sentence . 'The crimes Henry has been convicted of today are appalling but I ca n't be certain that there are n't more victims out there . ' On sentencing , the Judge John Hillen said : 'You are a serial rapist . The terror you instilled in your victims , by use of weapons and words used and restraints do not bear imagining . 'Your crimes are at the highest end of wickedness and are disturbing for the public . 'You present a danger to women and present a significant risk of serious harm to the public . '
Ripper , 34 , lured prostitutes to his home in Hackney , east London . He threatened , tied up and repeatedly raped victims in 14-month spree . His final victim escaped with help of passer-by who heard her screams . She told officers Henry had said ' I 'm invisible , I 'm the Duwayne Henry ' during attack . Police found 'torture chamber ' with seven knives and saw in his bedroom . Believe he planned to use tools on final victim before he was interrupted . The serial rapist was jailed for life at Blackfriars Crown Court yesterday . Are you the mystery hero , or do you know who he is ? Please email gemma.mullin @ mailonline.co.uk .