FedEx Corp. was sued over an April 10 collision on a California highway that killed 10 people when one of the company’s trucks crashed into a bus taking high school students on a college tour. Jennifer Bonilla, one of five students who died, was horribly burned and perished from her injuries some time after the crash, her mother said in a complaint filed yesterday in state court in Los Angeles. The FedEx truck, which crossed the median and struck the bus head-on, was already on fire before the crash, according to the complaint.