In his speech, Mr. Sessions once again pointed to a faulty University of Utah analysis that blamed a spike in Chicago murders on a settlement with the ACLU. (In this case, the settlement actually involved the civil rights organization.) And while both things happened, a causal relationship isn’t established. There are any number of other communities that have ended stop-and-frisk practices, like New York, and watched violent crime rates fall. Philadelphia, Seattle and Newark, N.J., dropped such practices without an increase in homicides, as well. Meanwhile, researchers at the University of Texas at Dallas looked at the issue more broadly, studying 23 police departments that have agreed to consent decrees since 1990 and came up with an obvious benefit — fewer civil rights lawsuits aimed at those departments. And that’s no small thing given the payouts Baltimore and other cities have had to make to individuals who have been mistreated by police.