Iam so sorry.
I know how you feel. I too have just had that samething happen. 2 NIGHTS IN A ROW!!! One night it was my silkie roo, the next night it was my java roo. ARGH!!! I hope you catch your guy, it is so frustrating when someone invades your space. And then feels like they can take what ever they want. Again, good luck at catching that big meanie!