The St. Louis Police Department is using a new strategy to curb crime.
Aggravated assaults with firearms are up about 20 percent so far this year over last year.
The police department recently began working with University of Missouri-St. Louis criminology professor Rick Rosenfeld to reduce violent crime.
St. Louis Police Chief Dan Isom says the new strategy is to flood high-crime areas with officers during evening hours.
St. Louis Public Radio is a service of the University of Missouri-St. Louis.