IOWA CITY, Iowa (AP) — Federal safety regulators have shut down the troubled Iowa trucking company that owned the semitrailer involved in a human trafficking case in which 10 immigrants died in Texas. The Federal Motor Carrier Safety Administration placed Pyle Transportation under an “out-of-service order” Monday after a review found the company’s safety rating was unsatisfactory.

Dozens of immigrants were found packed inside a Pyle-branded semitrailer in the parking lot of a San Antonio Walmart in July. Eight people were found dead inside, and two more died after being hospitalized.

Pyle Transportation owner Brian Pyle has denied knowledge of the alleged human smuggling conspiracy. He has said that he sold the trailer and hired a contractor to drive it to Brownsville, Texas, to deliver it to the buyer.