The cars sat abandoned at the side of the road. Their engines idling, with hazard lights flashing, according to a witness who captured video of the incident on his phone. The occupants of the vehicles had been taken away by Immigration and Customs Enforcement officers late last month in what a local immigrant rights group calls “fake traffic stops.” During these encounters, ICE vehicles reportedly employ red and blue flashing lights to mimic those of local law enforcement agencies, duping people into pulling over. When family members arrived on the scene in Eagle County, Colorado, their loved ones had already...