Complaints coming from the California Independent System Operation (CAISO) and the Midwest Independent Transmission Operator (MISO) sparked an investigation into how JPMorgan was potentially gaming the system to its own benefit.

FORBES: JPMorgan Potentially Manipulating Energy Markets Using Abusive Bidding Strategies

The operation involved police, Customs and Excise officials and enforcement staff from the Vehicle and Operator Services Agency (VOSA).

BBC: A55 HGV spot checks shocking, says North Wales Police