The hacker Shm00p claims he served as an FBI informant and helped the US law enforcement track down the hacker turned ISIS fighter Junaid Hussain. The hacker claims to have provided useful information to the FBI allowing to track Hussain. Hussain was sentenced to six months in prison in Britain for hacking Tony Blair’s Gmail account in 2012. In 2013, Hussain left the UK and joined ISIS and was killed in a targeted US drone strike in August this year. The jihadist was also cited by two gunmen responsible of the terrorist attack in Garland, Texas.”]
Source: https://securityaffairs.co/wordpress/42223/hacking/isis-hacker-hussain-betrayed.html