I've just done some checking on this. Seems like the Authorities found that there were termites introduced into the sole which ate their way around the section that held up B's bed. It fell into the water and he drowned.

This would normally be considered an acceptable hazard of the transportation mode select, except that the termites were of a species found only in Australia and only in the desert there.

It's considered a "Highly Suspicious Death" by Interpol.