New Delhi: The Uber cab driver accused of raping a 27-year-old executive has been a serial sexual offender and was out on bail in a rape case in 2013 besides being involved in a similar case in 2011, police said today calling him a "big time rogue".

32-year-old Shiv Kumar had allegedly raped a woman in Mainpuri in Uttar Pradesh last year and was involved in at least two more cases including molestating another woman, investigators said.