1. I think it's fair to assume that data on websites is for them to use as they see fit and not how the customer sees fit. I expect nothing less of any corporation.
2. Yes, give police the data of someone who is in possession of stolen property.
He obviously could prove he had it in the first place. After that it's not up to Amazon to determine whether a crime took place, the police can handle that.
no money in helping law enforcement
It's a cost center only, I understand that. I doubt their 'law enforcement group' is heavily staffed or has any power within the organization at all. It's probably running as close to zero for resources.
Who is allegedly in possession of stolen property.
At this point there is no evidence that this is a case of theft - it could just as easily have been sold on, be a case of disputed ownership or whatever.
I agree that Amazon have little incentive to do much here but that doesn't necessarily mean inaction is the wrong thing to do - the easiest thing to do and the right thing to do can be the same.
1. Cynically accuse Amazon of being promiscuous with your data when it suits their profit motive.
2. Vouch that Amazon should be trusted to give police your data without introspection.
That's quite an expansive viewpoint.
As for there being "no money in helping law enforcement"...that's debatable. But there is definitely penalties for not fulfilling lawful requests.