What the hell why did the police even take his collection?
Homes of deceased persons and estate sales are broken into and stolen from all the time. It makes sense for them to move a large number of firearms like that to a secure location. Assuming of course they are property accounted for and the cops don't "help themselves" to a few... which would be my concern.
What I really don't like is the "tone" of the article that implies "OMG!!1!" or that there might be some misdoing. Only in Kalifornia or NY/NJ would this be about the gun collection.