I don't buy this claim. Negative numeric values would break the backend in 99% of scenarios.

I also don't really buy the claims he personally was involved in stealing the xrb. Bitgrail has existed for a while, and presumably the owner would have some interest in XRB, probably owning a substantial amount since it was worth nothing. Considering its meteoric rise, he probably became rich himself.

So why try to steal 170 million dollars in a scam where you're bound to be accused of being suspect number 1?