The article insinuates an unannounced visit:

After Reuters documented the disappearance of the young girl who worked at SMART, a team of state and federal authorities conducted the Aug. 9 inspection at SL, in Alexander City. They discovered seven minors there, including the two Guatemalan brothers, among employees making lights and mirrors for Hyundai and Kia. Alabama’s Department of Labor fined SL and JK USA Inc, a staffing agency, $17,800 each.

So it sounds like they gave them a fine and potentially a court date instead of taking hostages. That's my point.