Citizens' Anger Continues Over Toxic Water in Flint, Michigan

Recently uncovered documents show that Michigan officials may have known about water supply problem for months before the information was released to the public.
1:50 | 01/18/16

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Transcript for Citizens' Anger Continues Over Toxic Water in Flint, Michigan
Let's turn now to that water crisis out of Flint, Michigan, residents, including small children, possibly drinking contaminated water for more than a year. Those residents gathered all weekend long looking for answers. The trouble is, the more they learn the angrier they get and tonight the question is, was there a cover-up? Tonight Eva pilgrim reporting again tonight. Reporter: Tonight, angry residents demanding answers during a town hall in Flint, Michigan. Reverend Jesse Jackson there to lend his support. People of Flint have been betrayed. Reporter: Filmmaker and Flint native Michael Moore even calling for the arrest of the governor. He committed a crime, he knew what was he was doing. Reporter: Over the weekend president Obama declaring a state of emergency over the contaminated water. The state now under investigation after it changed its public water source exposing its 100,000 residents to toxic levels of lead. Families forced now to drink and cook with bottled water being trucked in daily. But Lisa, her four kids and her nears are still bathing in that water. It's hard to make sure everybody's been bathed properly, because we're really not supposed to use this water. Reporter: Water researchers point to this memo from the EPA to city water officials back in June, saying it shows officials knew that testing showed "High lead results" but didn't publicly admit it for another three months. It's a manmade tragedy that was completely preventable. Reporter: Professor Marc Edwards says for about $100 a day the city could have made the water safe. Instead, he claims they manipulated data and testing methodsto make it look safe. So many families exposed to lead for more than a year that can cause neurological damage. Local doctors are working to screen and help those children affected. The governor maintaining that he took action as soon as he knew of the elevated lead levels. Tom.

This transcript has been automatically generated and may not be 100% accurate.

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