He was arrested last year after the FBI found he had stolen classified data from many government agencies, including practically all the NSA's hacking tools.
Martin's arrest caused such a ruckus that NSA director Michael Rogers offered to quit.
[COLOR] EternalBlue exploit so powerful it was "like fishing with dynamite," required specific approval for deployment against targets. pic.twitter.com/L8RAsh2vYd— InfoSec Taylor Swift (@SwiftOnSecurity) 16 May 2017
A number of people, including Russian President Vladimir Putin and Microsoft president and chief legal officer Brad Smith have blamed the NSA for the WannaCry ransomware outbreak.
Critics of the NSA pointed out that if the exploit had been dumped before 2014, when the US government updated its Windows systems, the damage would have been much greater.
In its early days, EternalBlue was unstable and would often cause Windows systems to crash and show blue screens, a trademark of Windows systems known as the Blue Screen of Death or BSOD.
Because of this, the NSA staff using the exploit had to follow strict usage rules. After it was made more stable, the rules were relaxed somewhat.
One official who spoke to the Post was quoted as saying: "If one of our targets discovered we were using this particular exploit and turned it against the United States, the entire Department of Defence would be vulnerable.
“You just have to have a foothold inside the network and you can compromise everything.”