Willson, a postdoctoral scientific researcher from leafy Chertsey just west of London, had only been in the United States for two days when he died in the freak incident.
Laundrie also sent text messages between his and Petito's cellphone for days after strangling Petito to death in an attempt to make police believe that she was still alive.
GM also is expected to invest at least $4 billion in Orion Township to build versions of the new Chevrolet Silverado and GMC Sierra electric pickup trucks.