Commissioner Sir Bernard Hogan-Howe says his police officers face a “Catch-22″ situation over historical sexual abuse claims and were criticised if they did not take allegations seriously yet condemned for pursuing them.
“If we investigate to the point of charge – we are challenged – did you go too far? And I think we have got to take these things seriously and the place to test it is called a court.”
He was speaking after the Director of Public Prosecutions (DPP) defended trials brought after the Jimmy Savile scandal.
Last week DJ Dave Lee Travis was cleared of 12 indecent assault charges dating back to the 1970s.
The jury was unable to agree verdicts on two other counts.
Coronation Street actor William Roache was also recently cleared of historical rape and indecent assault charges.