https://phys.org/news/2018-07-fresh-dna-authenticate-bones-russia.html

Genetic tests ordered by the Church—which disputed earlier results—"confirmed the remains found belonged to the former Emperor Nicholas II, his family members and members of their entourage," said the Investigative Committee, which probes serious crime and has been roped in to resolve the long-running debate.

The tests involved exhuming Nicholas's father Alexander III, proving "they are father and son," investigators said.