Supporters of Kamala Harris have used an AirTag to track down what they said were stolen campaign yard posters in Missouri.
Laura McCaskill and her partner filmed an encounter with a man they accused of stealing the signs, one of which had the tracking device attached.
Ms McCaskill found dozens of the posters in the boot of a car and said it was like "like finding a dead body."
Local police confirmed they had seized the signs and were investigating.
Stealing campaign yard signs is classed as a misdemeanour under Missouri law.