It mentioned the recent investigation by the Wall Street Journal that found more than 4,000 items for sale on Amazon’s site that “have been declared unsafe by federal agencies, are deceptively labelled, or are banned.”

The investigation revealed the availability of myriad problematic items on the e-commerce site including defective helmets, toys and cosmetics incorrectly labelled as US Food and Drug Administration (FDA)-approved, unregistered pesticides, and pain relievers lacking appropriate FDA warning labels, among others. The letter mentioned the traumatic story of a family whose life Amazon’s negligence changed forever.

The incident involved 23-year-old Albert Stokes who died in a motorcycle crash in 2014 when his helmet came off. The helmet, purchased from Amazon, was not compliant with federal safety standards and had been recalled.

While the helmet in question has been removed from Amazon’s site, many other problematic items remain on Amazon’s platform, the letter mentioned.