Michigan diesel engine tampering leads to US charges.

Eleven people, including three companies, have been charged in Michigan for tampering with software and hardware in heavy-duty diesel engines to evade air-pollution rules. Nine of the 11 have agreed to plead guilty. Diesel Freak LLC, Accurate Truck Service, and Griffin Transportation have agreed to pay fines. Diesel Freak rigged at least 362 vehicles, from 2015 to late 2018, and some “are still on the road,” U.S. Attorney Mark Totten said.