The luger that died was Georgian. Not from the state of Georgia in the USA; but, the country of Georgia (close to Russia).
Right now, the opinion on the death is that it was a combination of a very fast track and a reasonably inexperienced luger. The track has not been declared to be unsafe or the cause of the accident so far; although, they lowered the height of the launch pad after the accident.
I imagine it will be quite a while before the truth, whatever it may be, will emerge.