The principle of ex turpi causa prevented the claimant from recovering damages after the commission of manslaughter.
Gray v Thames Trains Ltd (2009) UKHL 33
The claimant was a passenger in the Ladbroke Grove train crash who subsequently suffered from PTSD, committed manslaughter and was detained. He sought damages for negligence. The defendant admitted liability but argued that the principle of ex turpa causa prevented the claimant from recovering any damages from the date of the manslaughter conviction.
Held: in so far as the claimant's claim relates to losses suffered after the commission of the act of manslaughter, that claim must be dismissed.
Bailii
Law Reports website - Permission to appeal to HL given 27/10/08