Pantos told NPR they stayed at least 10 feet away from the agents and did not interact with them, but noticed an agent taking photos of another observer’s license plate.

Hours later, Pantos’ spouse, Carly Williams, a nonprofit consultant, said she received a call from a blocked number. A deep male voice on the other end of the line asked for her by name and identified himself as calling from the Department of Homeland Security.

Williams said the caller asked if anyone else drives her vehicle. When Williams mentioned her spouse sometimes did, the caller asked Williams if she knew her spouse had stopped at an incident that morning.