After that quickly fired off reply, which I do often, I wanted to explain myself further on why I would not turn in ALMOST any gun I found.
Consider the reasons you would find a gun in a place like a lake or the woods.
1. It was used in a crime, which could include the gun being stolen which is a crime in itself. Unless found recently dropped/dumped, odds of connecting it to said crime are nil.
2. It was lost accidentally. Again, unless it looked recently dropped, I would not likely turn it in. Police generally have no interest in returning the gun to the original owner, and if it did not show evidence of a crime, like a filed off serial number, it would be destroyed or 'disappear' from the station with an officer.
3. It was lost purposefully. Some people such as widows or children inherit guns and want nothing to do with them. I know indirectly of a widow who threw her dead husband's WW2 luger into the trash when he died, not wanting a gun in the house. I can easily see someone dumping a gun in a lake or burying it as a means of disposal.
The only time I would turn in a gun would be if it was something freshly dropped, or illegal to own such as a full auto machine gun or a sawed off shotgun.