Marks & Spencer shares have endured double-digit losses since the retailer revealed it was the target of cyber-attack, which has hobbled the group's trade in recent weeks.
Tyler Buchanan, 23, is the suspected boss of the Scattered Spider cyber gang who crippled the supermarket over Easter weekend, wiping hundreds of millions off its market value.
Scotland Yard detectives are currently probing the devastating IT meltdown which has caused the retail giant to pause its click and collect service for more than a week.
Last week, as Marks & Spencer was grappling with the escalating chaos wreaked by hackers, an unassuming young British man boarded a plane to the USA alongside law enforcement officers