JTT - it was a fella called John Stalker, who was Deputy Chief Constable of Greater Manchester. (What a name for a policeman!) Anyway, he was getting too close to the truth, over in Northern Irekland, so he got framed by his colleagues for associating with someone who was himself framed and jailed for corruption - and later cleared.

His career as a policeman was wrecked, but he's highly regarded. Here's a page about him, but it doesn't mention much about the Northern Ieland business, because it's meant to get him bookings as an after-dinner speaker, and I suppose a whiff of controversy might get in the way there.