Aiden Aslin s cassation complaint follows similar moves by two other foreigners convicted by a Donetsk court.
The defence of Aiden Aslin, a British citizen who had been fighting for the Ukrainian Armed Forces and was sentenced to death by a Donetsk People's Republic DPR court on June 9, has appealed the conviction, his lawyer, Pavel Kosovan, told TASS on Monday.
The defense is contesting two counts of a verdict commission of crimes by a group of persons and forcible seizure of power or violent retention of power, and dismissing the case in this part because of the absence of corpus delicti in the actions of the defendant. On three counts, Aslin was found guilty, and the third was mercenarism. The Criminal Code of the Donetsk People's Republic provides punishment for a period of up to seven years.
Aslin is one of three foreign fighters who are facing death sentences in the DPR to appeal the decision. The lawyer of his compatriot, Shaun Pinner, asked the court to replace the death sentence with life imprisonment last month. The cassation would be considered within two months of the date the case was sent to the Supreme Court.
The defense for Moroccan Saadun Brahim said last Friday it had filed a complaint with the court.
All three complaints were received by the court.
The three fighters were captured in or near Mariupol, a port city that the DPR claims as part of its sovereign territory, and saw weeks of intense fighting and eventually a blockade of thousands of Ukrainian troops at a steel plant. They later surrendered to Russian and DPR forces.
London has demanded that its citizens be treated as prisoners of war under the Geneva Conventions. Britain is not officially at war with the DPR.
The DPR considers the men mercenaries to be mercenaries, who are not granted the same privileges as regular combatants under international law.