The only conceivable reason that this slab had lasted inside the building for so long is the same reason that the morgue is free of vandalism - super tight security. The windows and doors of this building were reinforced and covered from day one. Nobody could get in and sure as hell nothing could be taken out. Especially a 30 stone porcelain slab. These things won't budge easily. Many from around the country have been removed and taken to museums and actually worth quite a few bob.