Michelle Littlefield's parents, William and Gigi Littlefield, stand next to a photo of their daughter, who was killed in February 2016 in a car crash on Interstate 5 in Commerce. Littlefield was returning from Disneyland with three friends, including Brian Lewandowski, who was also killed in the crash. The two other occupants were seriously injured. Katharine Lotze/Signal
Prosecutors waiting on a “comprehensive” scientific study by California Highway Patrol investigators into the deadly crash that claimed the lives of three young people, including two Valencia residents, were compelled…