Police presence is often all it takes to make voluntary experiences seem mandatory. Ricardo Nieves, one of those flagged down by Reading police officers, felt the experience was anything but voluntary, and that attempting to leave would have been greeted by a possible arrest. The Reading city council and the mayor himself also expressed concern about the use of police officers to acquire "voluntary" blood and saliva samples. For his part, Chief Heim appears to be ready to just ride out this outrage without offering any concession towards the offended public. But if that's what Heim had planned, Nieves just threw...