Card, if you let steam investigate, they can always know what was wrong.
My friend fell for a fishing link and they recovered his items within 5 days. You just need to contact steam support with the method you got hacked with. (most likely a fishing link in this case)
And they will reply with "give us a screenshot of your recent trade history. And when you do that, they will tell you to give them some verification that you're the owner (like CD key or any game payment receipt)
They would investigate a bit and then you will get your items back.
P.S: If you found out that this guy stole your items from trade history, please know that it means also that his steam is hacked too. So you might be tracking the wrong guy.