Re: Please foregive my ignorance in this but...
Who's Suzy? I only know Alice :P
Yes you could trace the transactions back but...
You still can't seize the bitcoins or ban them from trade.
You still can't ID the owner, only the address.
After many transactions with unidentified addresses the bitcoin could end up in a legitimate account that got it through a legitimate transaction. You can't expect them to know every bitcoin's history just because they own it, and you can't very well charge them for holding it.
The criminal could upload the stolen bitcoin to an online exchange. Most of them still only ask for an email UNLESS you want to withdraw cash. You can still withdraw bitcoin and certainly you can withdraw other cryptocurrencies.
Even if they only withdraw back in bitcoin in another withdrawal address, the trail is lost because the coin they get is not the same they gave the exchange. Unless the cops can force the exchange to give up the email address.
A much better plan would be to withdraw on an entirely different blockchain, preferably one built with anonymity in mind like dash or monero.
I suppose its still possible to catch them but the amount of effort is too much