"Lawyer Grabowski was killed with a firearm," the prosecutor told a briefing.
He added that the investigation detained two persons suspected of abducting the lawyer, one of them subsequently pleaded guilty. The body of the killed man, who disappeared on March 9, was found buried in Ukraine's Cherkasy region in the wood close to the town of Zhashkov.
In May 2015, Russian nationals Yevgeny Yerofeyev and Alexander Alexandrov were taken prisoner near a front-line town in the Luhansk region in eastern Ukraine. Kiev authorities claimed that the detainees were active-duty Russian army servicemen.
The Russian Defense Ministry dismissed the claims, acknowledging that Alexandrov and Yerofeyev had received military training in the Russian Armed Forces in the past, but were not on active duty at the time of their arrest. Moscow has demanded the release of the prisoners.
