The Independent Police Complaints Commission said that Coleman-Farrow appeared to be a "rogue officer who set out to deceive".
Deputy Chairwoman Deborah Glass said their investigation did not reveal any systemic or serious supervisory failings, and that the Metropolitan Police had reviewed all cases where he was the officer in charge.
"While we may never fully understand the motivation for his actions, Mr Coleman-Farrow appears to have been a rogue officer who set out to deceive.
"While dealing with rogue individuals must always be a concern in any system, supervisory systems will not necessarily pick up on an officer who has concocted evidence to cover their tracks."
The Metropolitan Police dismissed Coleman-Farrow in April 2011.
More top news
The Number 91 was travelling from Trafalgar Square to Tottenham in north London when it came to an unexpected halt.
It didn't take long for the converted flower shop to be snapped up. 220,000 people looked at the advert on Zoopla.
Glen Hazel, who was an 11-year-old schoolboy, has a clear memory of the events of 1966.