Sohn: Where's the justice in Flint water crisis?

In a March 21, 2016 photo, the Flint Water Plant water tower stands in Flint, Mich., where residents were exposed to high levels of lead in their tap water. (AP Photo/Carlos Osorio)

It was good last week to finally see criminal charges filed in the Flint, Mich., water crisis.

What was better, was to hear Michigan Attorney General Bill Schuette say there's more to come.

The first charges against three local and state officials have been termed misconduct of career bureaucrats. But according to the Detroit Free Press, the prosecution team is trying to uncover more about why these individuals, as well as others still under investigation, may have acted the way they did and who may have instructed them to do so.

"Nobody is ruled out," Schuette said.

The charges stem from the lead contamination of Flint's drinking water in April 2014 after the city, under the control of a state-appointed emergency manager, switched its drinking water source from Lake Huron water treated by the Detroit water system to Flint River water treated at the Flint Water Treatment Plant.