The parents of Oxford High School student Ethan Crumbley made a brief appearance in court on Tuesday related to their four involuntary manslaughter charges.
Temporary employees have been working at cereal plants across Michigan, Nebraska, Pennsylvania and Tennessee since the strike began in October.
The trucking industry is short 68,000 drivers. By 2028, industry officials fear the number could jump to more than 100,000. A California high school allows seniors to learn trucking skills.