He passed away in 2020.

https://www.thesun.co.uk/news/12156...ckey-the-pimpernel-green-evaded-capture/

Downfall of the supergrass who thought he was untouchable

https://www.theguardian.com/uk/2001/dec/23/drugstrade

When his handler switched jobs, Michael was passed on to Detective Constable Paul Carpenter. By now his extensive contacts in the underworld were providing information about the movements of key figures in the Chicago Mafia, the IRA and Colombian drug cartels. Green wanted to expand his UK operations, he asked Michael to assist and soon a massive operation was on line.


"The king is dead, long live the king!"