Is Derren Brown campaigning for the release of Sirhan Sirhan?

I've just finished watching the first of Derren Brown's new series - 'the experiments'. In it (without trying to spoil it for anyone who didn't catch it) he used hypnosis to try to see whether people could be trained to assassinate someone without knowing it. This was the defence used by Sirhan Sirhan - who is still behind bars for Bobby Kennedy's assassination and who has lost 14 parole appeals.

You can find more about it on Derren Brown's blog...