A major global crypto investment scam investigation has led to the arrest of an alleged key figure behind an international criminal organization accused of defrauding victims of more than €100 million every month. Dutch police announced multiple arrests across Europe following a long-running investigation into a fraud network that allegedly employed over 700 people operating from around 20 call centers worldwide.

The main suspect, a 46-year-old dual Israeli and Polish national, was arrested at an airport in Poland on May 26 at the request of Dutch authorities. Investigators believe he played an indispensable role in the organization, which allegedly carried out large-scale investment fraud...