Prosecutors failed to take three abuse allegations against Savile - which could have led to charges -seriously enough, a report has found.
The claims relate to Surrey and Sussex police.
Details of a review of the decision not to prosecute Savile in 2009 were disclosed today.
It found that "had the police and prosecutors taken a different approach" prosecutions could have been possible in relation to three victims.
Alison Levitt QC, the author, said that there was nothing to suggest the victims had colluded in their stories, or that they were unreliable.
Police and prosecutors treated their claims "with a degree of caution which was neither justified nor required", she said.
Jimmy Savile could have been prosecuted for offences against at least three victims while he was alive, two separate reports said today.
The allegations began with the ITV documentary Exposure. Here are some of the key points as the case unfolded.
Police and the NSPCC will release a report on claims of sex abuse against Jimmy Savile