This is the first I've ever heard of this: Guns confiscated after KS tornado

Greensburg, Kansas:

The tornado happened at 9:46pm on Friday evening, May 4, 2007 and they were forced to leave within a couple hours of it, being given no time to collect themselves or assess the damages or even try to pick up anything such as guns and valuables. Ed Klummp, Police Chiefs Association, testified at the House committee hearing with a position opposing The Emergency Powers Act and said the evacuations were so they could search for bodies and shut off gas and power and that the evacuation was for the safety of the residents. I have been told by a reliable source that the electricity was shut off prior to the tornado striking and the gas was shut off within a few hours after. It would seem that the evacuation was not necessary in light of that information.

With homeowners removed from their property, the fun began:

Many guns and other valuables such as jewelry have gone permanently missing and have never been recovered. There were some houses that were not destroyed and were in tact and habitable. Those folks did not want to leave but were forced to do so. When they returned they found their houses had been broken in to and all of their guns missing. One gentleman reports that when he went to claim his guns, taken from his secure home, they were returned to him in damaged condition. They were not damaged by the tornado. They were locked up in his home and illegally confiscated.

He was not alone:

When people first came to collect their guns they were asked for proof of ownership such as receipts and serial number lists and they had to fill out a 4473 and get a NICS approval before they could claim their guns. No one had paperwork, receipts, or lists of serial numbers because it had all blown away. Later into the process they quit demanding these items and asked only for a list with make, model and description of the firearm. In one case, in the collection trailer, a gun case was claimed by one man who had a very nice trap shotgun in it and when he opened the undamaged and closed case, he found not his nice BT99 but another damaged gun that did not belong to him. That $1500.00 BT99 has never turned up.

Even if only a quarter of the claims are accurate, this is unbelievable.

Unfortunately, "unbelievable" is only a figure of speech and not a statement of actual disbelief. Sadly, it sounds all too familiar. We're way past the point where law enforcement agencies get the benefit of the doubt in situations like this.