A truck driver accused of making an illegal U-turn that killed three people in Florida last week was denied bond Saturday.

Harjinder Singh, the semi-truck driver accused of making an illegal U-turn on the Florida Turnpike that then caused a deadly crash, will remain in the St. Lucie County Jail while his court case proceeds.

Washington authorities probe how Harjinder Singh obtained his commercial license before the wreck that has become entangled in immigration policy debates.