From a Minneapolis Star-Tribune account last week:

…a Predator drone led to the arrests of farmer Rodney Brossart and five members of his family last year after a dispute over a neighbor’s six lost cows on his property escalated into a 16-hour standoff with police.

It is one of the first reported cases in the nation where an unmanned drone was used to assist in the arrest of a U.S. citizen on his own property…

Many more cases are likely to follow, in areas that include drug enforcement, child welfare and environmental regulation. Warns the ACLU in a report issued in December