The Oklahoma Department of Public Safety has purchased several devices capable of seizing funds loaded on prepaid debit cards. These devices will be in law enforcement vehicles, and enable troopers to freeze, seize, and return stolen cards.

Troopers hope that these scanners will be useful in roadside seizures of suspected drug-trafficking

Source: Hot Hardware – Oklahoma Cops Use Scanners To Siphon Funds Without A Warrant From Prepaid Cards