India, June 17 -- The Russian-speaking handler, a shadowy figure known as "El Money," was not happy. A string of arson attacks targeting a car and two London homes linked to British Prime Minister Keir Starmer had attracted little attention, possibly because the then 21-year-old attacker, a Ukrainian recruited online, was not very good at documenting them.

One video that was supposed to show Starmer's former car on fire lasted only seconds. The second, filmed in the dark, largely captured the repeated sound of striking matches.

El Money wanted publicity and was prepared to pay. The attacker, Roman Lavrynovych, was found guilty Monday alongside his accomplice. But the person - or network - behind the online persona of El Money has escape...