Dear Arthur and Karin,
I happen to like "off-topic posts". Especially if the off-topic interests me!
DNA forensics--particularly mitochondrial DNA id's--such as were used in the positive id's of the Imperial children of his late Majesty, Tsar Nicholas II, are making it possible for us to identify (or de-bunk) assumed identifications of individuals buried at Halifax or claimants of descent of participants in the "Titanic" disaster.
It doesn't matter, I suppose, unless human teeth are recovered from the wreck site. Teeth are the richest and most enduring sources of mitochondrial DNA, and DNA matching technology exists to connect a victim to a relative. This is why the wreck site is, in fact, a grave.
Regards,
Doug