From the TubeNet forum:
One of the guys in our studio had his car broken into earlier today, and his professional model Sterling euphonium (4v compensating) that he purchased from CMC this summer was stolen. I believe it was in a gigbag, it's silver, with the gold slides and such. I don't have the serial number on hand, but I can put you in contact with him. PM me.
He's already notified the police, and has spent hours checking the pawn shops, but no luck so far. The horn was insured, but we all hope he will have it back very soon.
Please be on the lookout for it.