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.
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
A shadowy group operating under the name Scattered Spider was yesterday said to be behind the attack, which has crippled the retailer for more than a week.