Police often seize things that have no reasonable connection to a crime--because they can. They merely submit an overly broad warrant application to the judge, and judges usually sign them. Or sometimes they seize guns "just because." There was an incident recently in Southern California where a wealthy gentleman kn own for his arm candy and machine guns (most of which he keeps in Nevada) had his home broken into. The burglars tied unsuccessfully tried to get into a steel door gun vault he'd had built, without success. When contacted by the caretaker, the police demanded access to the gun vault, which was refused. The police then broke through the door and seized all of "assault weapons" types of firearms that were there (leaving some very valuable rifles) for "safe keeping." I will be surprised if he gets them back without a lawsuit. In another case, where a retired police officer and gun collector was arrested on a bogus illegal sales charge (that was later dropped) the police seized over 350 firearms, and after the criminal case was dismissed, demanded all kinds of proof of ownership, giving back a trickle of weapons, but ultimately destroying most of the collection upon the application of the LA City attorney who was negotiating with the owner's attorney for their return. How many actually made it to the shredder is anyone's guess. San Francisco and Oakland were both sued over their refusal to honor certificates from the DOJ authorizing the return of weapons to owners, requiring (often repeated) proof of ownership (even when they had taken the gun from the owner and provided a receipt). The unstated but clearly official policy of these departments is that civilians should not own guns in their towns, and they will do everything possible, including illegal acts, to prevent returns until compelled to do so.