FBI arrest cyber expert who ended WannaCry attack

A cyber security researcher widely credited with helping to neutralize the global "WannaCry" ransomware attack earlier this year has been arrested by the Federal Bureau of Investigation, the U.S. Marshals Service said on Thursday.

Marcus Hutchins, a British-based malware researcher who gained attention for detecting a "kill switch" that effectively disabled the WannaCry worm in May, was detained by FBI officials in Nevada days after tens of thousands of hackers descended on Las Vegas for the annual Black Hat and Def Con security conferences, a U.S. Marshals Service spokeswoman said.