The thing is, it's just another car to them. They don't care that it's an Evo (and why should they) If no one's reported one stolen, they're not going to drop everything and collect it.

If I had the space I'd be tempted to tell the police that you were putting it somewhere safe and to contact you if the owner contacts them. Then after 6 months I'd tell the police that I was going to charge them for storage, and break the car.