Willy Aceituno said he’d just left a Charlotte restaurant Saturday morning when federal agents approached him in his pickup, broke a window and stole his keys. “Are you an illegal immigrant?” he said an officer asked in the parking lot outside Pollo Campero, near the intersection of South Boulevard and Archdale Drive. Aceituno recounted the conversation to a Charlotte Observer journalist at the scene. “I don’t have to answer your questions,” he said he replied. “Why don’t you ask other people that? Why just me?”