The University of Chicago Crime Lab's Policing Leadership Academy tackles some serious topics like how to make data-driven decisions or how to help officers handle on-the-job trauma.

See The Ark's lineup of September events.

LOS ANGELES Andrew Alexander, the CEO and co-owner of famed The Second City improv theater, said he is stepping down after a former performer leveled accusations of racism against the comedy institution. In a lengthy letter posted on the companys website, Alexander said he failed to create an anti-racist environment wherein artists of color might thrive. I am so deeply and inexpressibly sorry,He vowed Friday that he will be replaced by a person of color. Alexanders announcement Friday followed online criticism from Second City alumnus Dewayne Perkins, an actor, comedian and writer (Brooklyn Nine-Nine). His posts followed a Second City online message of support last week for Black Lives Matter.