Cyril Smith's "extremely dominant" personality made his victims reluctant to come forward with allegations, according to a police report accusing the former Liberal MP of committing numerous indecent assaults on teenage boys.
The assaults allegedly took place in a residential hostel whose establishment Smith had been the "prime motivator" behind.
The redacted document says Smith enjoyed great prestige in his home town of Rochdale, where he was "dominant in council affairs" and had "favourable publicity" from the local newspaper.
It also says the 29-stone politician's "sheer physical bulk" was one of the factors that "overawed" his young victims.
More top news
Police e-fit software been used to create the faces of the most beautiful man and woman in the world.
A new law which allows councils to ban activities in public spaces is leading to "bizarre new criminal offences", campaigners claim.
The Serious Fraud Office has been fined £180k after confidential documents from a high-profile investigation were sent to the wrong person.