Richard Liddleley
Sir Richard Liddleley was an Assassin who foolishly accepted a contract on Sir Samuel Vimes two months before the events of The Fifth Elephant. He didn't succeed, but was found tied to a fountain in Sator Square, painted pink and with a flagpole stuck somewhere you certainly wouldn't want a flagpole stuck.
Annotation
His situation mirrors that of a hapless bridegroom-to-be in certain British subcultures the morning after a typical stag night.