"Flint was a casualty of arrogance, disdain and a failure of management," Michigan Attorney General Bill Schuette said.
Schuette announced Tuesday he has filed charges against four more people for their alleged role in the Flint water crisis.
SEE MORE: Flint Had Lead In The Water; This Town Has Lead In The Land
Two state-appointed emergency managers and two city employees face several felony charges, some of which carry a sentence of up to 20 years in prison.
They also face misdemeanor charges.
Schuette said the four conspired to mislead the state's treasury department in order to gets the tens of millions of dollars in loans needed to pay for a water pipeline. Part of the deal to construct the pipeline bound Flint to using the Flint River as an interim water source. It also required the city use the Flint Treatment Plant— despite the fact that the plant "was not ready to produce safe, clean water."
"All too prevalent and very evident during the course of this investigation has been a fixation on finances and balance sheets. This fixation has cost lives," Schuette said.
SEE MORE: Judge Requires Bottled Water Be Delivered To Flint Residents
The city, which was in financial crisis, decided to switch its water source to the Flint River in 2014. Corrosion caused lead from the city's aging water pipelines to seep into the water supply.
The charges announced Tuesday bring the total number of people charged to 13. The investigation is ongoing, so more charges could be filed.