A year-long Associated Press investigation found that Washington state law enforcement agencies sold almost 6,000 firearms that were confiscated during criminal investigations, and more than a dozen of those guns ended up in new crimes.

The AP analysis, using multiple databases created from hundreds of public records to find matching serial numbers, tracked for the first time some of the weapons that police put back on the streets. The guns were seized at gang hangouts, used to make death threats, found in drug houses, possessed by convicted felons, hidden in a stolen car, and owned by a man suffering a mental health crisis.