ST. LOUIS — The Latest on a judge’s order prohibiting St. Louis police from using chemicals on protesters (all times local):

2:45 p.m.

The search for a new St. Louis police chief is narrowing, and city leaders expect to name the new chief by the end of the year.

Mayor Lyda Krewson’s spokesman, Koran Addo, said Wednesday that the list of 42 applicants has been narrowed to 10 candidates. The group will be narrowed further to six finalists by Dec. 14, when they will be interviewed by members of the International Association of Chiefs of Police and the Citizens’ Advisory Committee. The police chiefs association is acting as a consultant in the search.

Krewson and Public Safety director Jimmie Edwards will conduct final interviews on Dec. 15.

The announcement Wednesday came the same day a federal judge ruled that St. Louis police can’t shut down non-violent protests or use mace or tear gas as a way to punish people who have been demonstrating for weeks.

11:30 p.m.

A federal judge has ruled that St. Louis police can’t shut down non-violent protests or use chemical agents such as mace to punish people demonstrating against police conduct.

The Wednesday order responds to an American Civil Liberties Union of Missouri lawsuit against St. Louis over police tactics during ongoing protests following the acquittal of a white former police officer in the 2011 killing of a black man.

The lawsuit accused police of unnecessarily using tear gas and pepper spray, arresting bystanders and a journalist, and taunting some of those arrested. Police say protesters threw rocks at officers, sprayed some with unknown substances and shattered shop windows.

The order applies while the lawsuit moves through court. U.S. District Judge Catherine Perry wrote it’s needed to protect First Amendment rights during protests.