US police would not fight culture crime?

Culture Property Observer, ACCG President (?) Peter Tompa tries to save face after accepting that if he’d checked out the facts of the case before posting his “German police run amok…” blog post, he’d have discovered that the story of the German investigations of collectors was not quite as the Californian coin dealer had led us all to believe (it’s what he is now calling a “different perspective”). So now he claims:

it is gross overkill to seize an entire coin collection based on a few coins purchased openly on a commercial website like eBay that allegedly came from an illicit source. The" little guy" simply does not have the financial resources to contest these seizures or the stomach to stand up to police intimidation that demands a collector surrender his entire collection to avoid possible prosecution.

I’d like to ask the lawyer how it is in Washington. The police investigate somebody (let it be an unemployed German immigrant) for receiving four stolen items, the police have proof he bought them. They could be stolen cars, TVs, ipods, mobile phones, Old Master paintings, whatever. On a visit to the suspect's property, they find another fifty three items of the same nature there, and the person already under investigation is unable to present any documentation proving legal origins of those other items either. What is the Washington policeman to do? Is it really “police intimidation” for the investigating officer to impound these other items for the duration of the investigation? Or is it a policeman actually doing the job they are paid to do? Is it really "overkill" to conduct an investigation of crimes like theft and handling stolen goods thoughly? I wonder if Mr Tompa has ever been the victim of burglary or vehicle theft?