The man driving a school bus that struck and killed a 5-year-old boy in Boston late last month had an expired school bus certificate at the time of the collision and has since resigned, Boston Public Schools confirmed Thursday afternoon.

Boston Public Schools identified the bus driver as Jean Charles. Charles had an expired school bus certification at the time of the crash and resigned on Wednesday ahead of a scheduled termination. In a statement, a Boston Public Schools spokesperson said:

City councilors Erin Murphy and Ed Flynn say information about the incident is coming out too slowly. They're considering a city council hearing to discuss school bus safety procedures.