A man has been jailed for life for what police have said were two "sadistic and extremely degrading" sex attacks.
Arun Patnaik's DNA was found on both the victims
Arun Patnaik, 31, of Delphene Avenue, Blackpool, was convicted at Manchester Crown Court of five counts of rape and four counts of indecent assault.
Patnaik attacked a 26-year-old woman in Manchester in February 2006, and a 32-year-old in Preston two months later. Both were prostitutes.
He will serve a minimum of 11 years and 160 days in prison.
Patnaik was caught by DNA evidence that linked him to both offences through a joint investigation between Lancashire Constabulary and Greater Manchester Police.
The first victim was assaulted and raped by Patnaik, the court heard. He also took pictures of the attack on his camera.
His second victim was attacked in a car behind a garage in Avenham, Preston.
The court heard that he carried out a violent attack on the woman, before tying her up with tape.
His DNA was found on the victims' skin, clothes and the tape used in the Lancashire attack.
Det Ch Insp John Dineen, of Greater Manchester Police, said: "The acts Patnaik forced these women to do were sadistic and extremely degrading.
"It is the bravery of these two girls that I applaud and I am deeply indebted to them for their courage during the trial.
"It is their evidence that has greatly assisted in the conviction of this man."