The FBI has joined a multi-agency investigation into whether any laws were broken in the Flint, Michigan, drinking water crisis, NBC News reported.
The lead contamination dates back to April 2014, when Flint stopped buying water from Detroit and began using water from the Flint River, which corroded underground pipes, leaching lead into the system and poisoning children.
Residents of Flint were also exposed to chemical byproducts, bacteria and Legionnaires' disease — but were repeatedly told the water was safe until this fall.
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Two employees of the Michigan Department of Environmental Quality have been suspended, and an administrator with the U.S. Environmental Protection Agency resigned because of the debacle.
The U.S. Postal Inspection Service and the Environmental Protection Agency Criminal Investigation Division are also involved in the probe.