Seven years ago, the Department of Justice called out St. Louis County police for detaining people without a warrant. Now, a federal appeals court says that system is “fraught” with constitutional risk. So, why do local police keep doing it? Maureen Hanlon, the Lead Attorney for Civil Rights Litigation at ArchCity Defenders, discusses the case, and the various ways the federal appeals court attacked the “wanteds” system — even while upholding its legality.