The mother of the survivor of Wednesday morning's horrific Tesla Cybertruck crash in the East Bay town of Piedmont that left three young adults from the East Bay community dead on Friday identified her son and the three other victims.

A fatal Tesla Cybertruck incident in Piedmont is being investigated by the National Highway and Traffic Safety Administration and California Highway Patrol after three Piedmont high school graduates died and another was hospitalized.

Piedmont’s Cybertruck crash, which left three dead and one injured, rattled the small Bay Area community. Details are sparse, but here’s what we know.