A perverted former nursing assistant collapsed when confronted by paedophile hunters for trying to have sex chats with a 12-year-old on Facebook.
John Gibson befriended what he believed to be a real child online, not realising it was a decoy account set up by vigilantes.
Gibson, who spent 20 years working in psychiatric hospitals until he was sacked for sending sexual images to an adult, engaged in the illicit chats last February.
