"In 2009, the paedophile Jimmy Savile was interviewed under caution by police in Surrey and Sussex. Subsequently, the police referred 4 cases to the CPS alleging that Jimmy Savile had abused 3 girls under the age of 16.

The CPS, after receiving the files from the police, refused to prosecute Savile and dropped the case claiming ‘insufficient evidence’’.
After Savile’s death, and despite multiple attempts of high level cover ups,

We now know that he abused up to 500 victims over a four-decade period.
Why am I sharing this with you?
The man in charge of the CPS at the time, that decided there was 'insufficient evidence' to charge Savile, is the now Leader of the Labour Party Sir Kier Starmer."