Charles angry over Sikh sex convict on queen's barge
Harbinder Singh Rana was found guilty in August 1986 of five counts of indecent assault, 11 counts of assault causing actual bodily harm and one count of attempted assault, the Daily Mail reported.
Posing as a doctor, he performed internal examinations and administered injections to at least 10 women.
Rana served four years in prison, but has now become an important member of the Indian-origin community.
During the afternoon sail Sunday, Rana came in close contact with every senior royal including Prince Philip, Prince Charles, Camilla, the Duke and Duchess of Cambridge and Prince Harry. Rana was accompanied on the boat by his 22-year-old daughter Kamalpreet.
The man was invited to join the celebrations by Charles, whom he met through his charity work for the Anglo-Sikh Heritage Trail, a group that promotes Sikh culture in Britain.
MPs have now demanded an investigation into the security blunder.
Bartholomew Leigh, 76, a retired detective sergeant who led the investigation into Rana's crimes in the 1980s, described him as a "con merchant".
"This man was a con merchant who was convicted of a number of serious crimes on several victims. If he is capable of posing as a doctor to molest young women in their own homes, it makes you wonder what else he could be capable of," Leigh said.
The former detective officer said that at least two newspaper articles relating to Rana's case could be found on internet using a simple Google search, suggesting even basic checks on his background had not been carried out.