The latest such figure is Clive Driscoll - a retired detective chief inspector who won plaudits and acclaim for his handling of the re-investigation of the notorious murder of Stephen Lawrence (which finally saw two people convicted after almost 20 years).
Interviewed on the BBC's Newsnight program, Driscoll said of his investigation into alleged historical abuse at care home in the 1980s:
"Some of the names were people that were working locally. Some people that were if you like, working nationally, there was quite a mix really because it appeared that it was connected to other boroughs and other movement around the country. I certainly in a case conference disclosed suspects' names, 100%, but I was informed that was inappropriate and I would be removed from my post. Whenever people spoke to you and shared their fears and their story about what they had seen, it was almost on the proviso that they wouldn't make a statement and that they would be scared if you released who those people were that were talking for fear of reprisals to both their selves and their families."
The former detective alleges that it was the 'uncomfortable' questions he asked of authority and public figures that led to his removal from the investigation in 1998, and a disciplinary hearing.
See also: conspiracy theories