[Monsanto] plead guilty to spraying a banned pesticide on research crops in Maui, Hawaii, the US Department of Justice said.

Monsanto Co., also the maker of weedkiller Roundup, will pay the fines for storing the pesticide Penncap-M, an “acute hazardous waste” at sites [on] Maui and Molokai.

…The company knew that its use was prohibited after 2013. Penncap-M is considered an “acute hazardous waste.” The company also told employees to reenter the area only seven days after the spraying, when it knew that years earlier, 31 days was set as the required amount of time. 

Monsanto pleads guilty to illegally spraying banned pesticide in Maui – CNN

Consequences for willful and flagrant endangerment of employees, locals, and the environment should include criminal prosecution for the decision makers involved.