This amount of $ is nothing to Paypal, if it all happened as the op stated, she should not have any issues with it, and if they told the buyer to destroy, the buyer should be off the hook as well, so scam worked. It IS a criminal matter against this buyer, not just civil. However the person who would bring the criminal case would not be the OP, it would be either California or Canada law enforcement, and there would clearly be a burden of proof that would need to be met, but for anyone reading this I just wanted to clear up that if there were proof (perhaps other claims, bag found with buyer, etc.) that this is a criminal matter. That does not mean it would also not be a civil matter as well, where OP could bring a case, however, at least in this country that might not be necessary after a criminal case. If the finding in a criminal case is "guilty" the standard of proof is beyond a reasonable doubt. In a civil case the proof is much less, so a guilty verdict would presume a verdict against the defendant in a civil court, so often if prosecuted there will be restitution to the victim in the case already.
I hope people read this, and it makes sense. I think there were a number of questions about this and why it is not criminal, and I wanted to clear that up. It is CRIMINAL , but it would be very hard to prove, and a criminal case would not be brought by OP, it has to be brought by govt. That doesn't mean a crime did not take place, as stated by the OP it would seem it was a crime. If it were me I would pursue criminal charges even after restitution with Chase, but that would likely not end up doing anything, but it would put the scammers name and information out there to the local PD. At least in the US, anyone can file a police report. It doesn't mean it will be investigated, but for that amount of $ I am guessing scammer would at least get a knock at the door depending on where he or she lives. Big City lots of crime, no visit. Small town, probably getting a visit from the PD. Then this happens again and this scammer tries this with someone else, well then there is some proof. I seriously suggest a police report be filed because this IS a criminal matter. Perhaps OP can protect others from this scammer by calling the local Canadian PD where this person is located, and checking in to filing a report. Now that the $ is returned there might be an issue of who can make the report (best now would be PayPal, but I would still do it because PayPal won't. I doubt $11,000 is any more than a drop in the bucket to Paypal. They probably made that or more in the amount of time I spent typing this.