By THE STAR STAFF A Dutch citizen accused of helping run a ransomware group that stole and leaked massive amounts of sensitive data from a Puerto Rico company has been arrested in the United Kingdom, federal authorities announced late last week. Fouad Eltibrizi, known online as Archduke, was taken into custody last Wednesday as part of Operation KillSwitch, an international crackdown targeting the cybercriminal group KillSec. Prosecutors say the organization carried out hundreds of intrusions…