Hi lilacgirl:
Sorry if I gave you the wrong impression. I'm certainly sympathetic to your situation, however, I have personal experience of the Police Service and would be extremely surprised were you to receive an admission of culpability, that's all.
You may well have some written comment from the officer in the case to the effect that he holds the property department to account, but as far as I can glean, without having all the details, he's merely giving you an opinion.
For example, just playing Devil's Advocate for a moment, how do you know that HIS incompetence has not caused your property to go astray and he's not just trying to deflect the blame? Without you, or your insurance company, having access to the Police records, all you have is what you're being told, apparently.
I can understand why you accepted the insurance payout, but by doing so you have probably unwittingly also given up your ownership to the property. And if your ins co aren't too bothered, you'll probably never get to the bottom of what became of your property.
I wish you the best of luck.