CHICAGO—Chants of “What do we want? Justice!” in English and Spanish rang out June 3 as family and friends of Miguel Flores and Erick Lagunas joined a protest at the State Office Building in downtown Chicago. They were demanding the Chicago Police Department and Cook County State’s Attorney’s Office reopen the investigation into the two men’s deaths. Flores, 22, and Lagunas, 21, were killed in a crash in November 2007 when their car was hit by an off-duty cop, John Ardelean.

Witnesses say the cop had run a stop sign and was driving on the wrong side of the road. Ardelean was initially charged with two felony counts of aggravated DUI, but the charges were dropped by prosecutors in May. The families are demanding the case be reopened.

—BETSY FARLEY