https://www.theregister.co.uk/2017/08/04/marcus_hutchins_wannacry_kronos_court_bail/

Marcus Hutchins, the WannaCry ransomware killer and now suspected malware developer, was told by a Las Vegas court on Friday he can be released on bail. He also denied any wrongdoing.

The British citizen was sensationally arrested and taken into custody on Wednesday by the FBI. The agents swooped as he was about to board a flight back home to the UK from America after attending the DEF CON hacking conference in Nevada last week. The Feds have accused him of writing and selling the Kronos banking malware from 2014 to 2015 with an unnamed associate.