US citizens Tatyana Kimberlin and Brett Kimberlin have filed a lawsuit in the District of Columbia court in Washington against Russia, demanding compensation for the death of Ukrainian Armed Forces fighter Andrey Rachok, Izvestia reported, citing court materials.

According to the newspaper, this is the first time in the United States that private American citizens have registered a lawsuit seeking to recover $20 million from Russia over the death of a Ukrainian militant, presenting themselves as his close relatives. Izvestia writes that the plaintiff is Tatyana Kimberlin, who calls herself the aunt of Andrey Rachok, who was killed near Avdeevka.

The couple claims they allegedly adopted the Ukrainian after his parents divorced and his mother died following a prolonged illness. However, the obituaries published on social media after Rachok’s death do not mention the Kimberlins, and his closest relative was listed as his grandmother.

According to the case materials, Brett Kimberlin was previously convicted in the United States on charges of terrorism, drug trafficking, and document forgery, and spent at least 17 years in prison.