It's almost like Waiguru. FBI normally let some non-life threatening scams continue in order to gather water tight evidence.
According to court documents, principals used Shy as their school supply vendor for items such as chairs, workbooks and paper, but the supplies rarely made it to the classrooms. In return for their help, the principals allegedly received $1 million in kickbacks that came in all forms: payments made to sham companies that the principals had created, cash, gift cards and house repairs, including a new roof and gutter work for one administrator.