A grand jury indicted bus driver Jing Sheng Dong on five counts of involuntary manslaughter after a fatal chain-reaction crash on Interstate 95 in Virginia.The collision occurred when the driver failed to reduce speed in a work zone, killing five Massachusetts residents and injuring dozens more.Authorities are currently investigating the driver’s commercial license qualifications and his English language proficiency following reports of inadequate oversight.The accused driver remains hospitalized under police custody and will face formal judicial proceedings once he is discharged from medical care.