64 allegations of sexual misconduct have been made against SS agents in the last 5 years.
http://www.bbc.co.uk/news/world-us-canada-18179611
Joseph Lieberman said the claims were "troubling", as he addressed the first congressional inquiry into the agency's Colombian prostitution scandal.
Many of the 64 complaints involved sexually suggestive emails, but one was of non-consensual intercourse, he said.
Secret Service director Mark Sullivan apologised on behalf of his agency.