The committee has already been criticized by Lewiston police, and a majority of the council agreed to direct city administration not to allow the chief to serve.
Lewiston's mayor and a city councilor announced the advisory committee last week following public forums to field concerns and feedback from residents regarding recent violence in the city.
Mayor Carl Sheline and City Council President Linda Scott issued a joint statement Wednesday announcing the committee one week after the pair hosted one of two community forums on the topic.