I think we all know there is a movement afoot to open the case once again. Ostensibly this is to address missing tissue sample results as well as tamping down the sensationalism surrounding the incident. I can surely understand the heartburn over the various conspiracy explanations. At an extreme, I can imagine the conspiracy theorists insisting the relatives of the dead protecting some secret in the case. Think, Tatiana was given a State secret to hide. The widening of conspiracy ideas are like medieval witch hunting.
The forensic tissue examination was likely discontinued in the interest of practical economy. When it was decided that the tent was cut from within and the autopsies did not reveal definitive homicidal injuries, then no need to test for poison.
The petition to reopen the case is a plea to restore honor to the memory of the lost. Is this an indictment of those who didn't do their jobs in 1959 or is it a way of stopping profiteering? Will any of it address the fundamental question of why they left the tent?