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 similar case in 2011, police said today calling him a "big time rogue".<br /><br />Delhi Gangrape Case: 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.<br /><br />Meanwhile, police on Tuesday questioned two friends of the Uber cab driver. The duo, identified as Gaurav and Kamal, are friends of 32-year-old Shiv Kumar Yadav, who used to drive Swift Dzire cab at times.<br /><br /><br /><br />For More information on this news visit: http://www.itvnewsindia.com/<br />Connect with us on Social platform at: http://www.facebook.com/InformationTV<br />Subscribe to our You Tube channel: https://www.youtube.com/user/itvnewsindia