Please get him to check daily with Recovery North West, when my bike was stolen, it was 6 months afterwards that the police managed to relate the burnt out remains being stored at RNW and I was charged for the storage. I called RNW and they said they had nothing in matching it's description. The Police are useless!!
I really hope he gets it back. The first time I had my first bike stolen, it was recovered by a local fella down the road where it was dumped because they couldn't get the steering lock off it. He might get it back yet, best of luck.