and since the other weapon was out there, they became prohibited for various reasons, including felonien covick, mental health, domestic violence. >> reporter: and each month, the california department of justice, compiles a list of people. >> people are advised when they are in court to turn over their firearms. but that someone is actually doing what they are suppose to do is where we're having the drop off. >> in the bay area, just four state agents do this work under risky conditions. and they are kind of at the mercy of the person that's on the other side of the door and opens the door. >> and we asked the state to provide a list of prohibited guns. they should have surrendered them to police. about a third of the and that turns into firearms. >> reporter: last friday, we went along as eight teams of the oakland police officers fanned out to reclaim those guns, targeting 46 gun owners. that prevents him of owning anything. >> other bay area counties are taking up steps to round off from people who are literally unknown. rs it -- after he refused to surrender more than 60 guns, they say tha