At them closely, examine any present carbon fibre they can find, see if that material had been stressed or fatigued, maybe that led to catastrophic implosion. also interestingly there will be looking at the debris fields, a couple of them that they found, they can tell by the size and shape approximately at what point that vessel may have imploded, a wider field would indicate that vessel may have imploded, a widerfield would indicate it imploded earlier into its time in a much smaller field would imply that it made it nearly to the bottom before some sort of catastrophe took place. live now t...