Ferguson Municipal Court
Her resignation comes after a wave of courtroom losses.
Videographer Mary Moore is among more than two dozen news professionals arrested covering protests since the police killing of teenager Michael Brown.
The agreement would force the city to eliminate certain laws and stop policing for profit.
A prosecutor withdrew the charges without explanation as trial was about to begin.
WHAT'S HAPPENING
Ferguson is negotiating over a federal rights lawsuit on their court practices.
He says the reforms mean "a fresh start."