ICE agents conducted traffic stops in Eagle County, Colorado, detaining up to 11 people, according to Senator John Hickenlooper and other Colorado lawmakers. After the vehicles were abandoned, family members retrieved them and found ace of spades cards printed with ICE Denver Field Office contact information left inside at least two vehicles. Immigrant rights group Voices Unidas said the cards reference a Vietnam War-era racist practice, while federal officials offered an alternative explanation that the cards reference the ace of spades as the trump card in the game Spades. The Department of Homeland Security announced an internal investigation into the agents' conduct. Hickenlooper demanded a meeting with DHS after the agency failed to respond to requests for information about those detained and the status of the investigation.