Naidan is serving a sixteen-year jail term for a 2021 fatal assault on a fellow judoka and childhood friend Erdenebileg Enkhbat.

[3] Tuvshinbayar won the men's 100 kg division's gold medal at the 2008 Olympic Games in Beijing.

He was the first Mongolian ever to win a gold medal at the Olympics,[4] by defeating Kazakhstani judoka Askhat Zhitkeyev[5] (according to the old rules of judo, where it is allowed to double and single leg takedowns,[6] with the legs grabbed by the hands,[7] similar to a freestyle wrestling).

In April 2021, Tüvshinbayar was jailed for 20 days following a drunken assault on Erdenebileg Enkhbat, who was a childhood friend.

On 9 June 2022, the Khan-Uul District Court sentenced Tuvshinbayar to 16 years in prison for the deadly assault.