After Defcon, the FBI arrested the UK national who stopped Wannacry

Update: Here is the indictment. Hutchins is accused of making and selling a keylogger called the "Kronos banking trojan."

Marcus Hutchins is the 23 year old security researcher behind the @MalwareTechBlog Twitter account; he's the guy who figured out that the Wannacry worm had an accidental killswitch built in and then triggered it, stopping the ransomware epidemic in its tracks. (more")