Zoé Tkaczyk

Impunity Watch News Guest Writer

 

KYIV, Ukraine – The Constitutional Court, Ukraine’s highest legal power, was in crisis before Russia’s invasion in 2022. Now the country, in the middle of armed conflict, must remake its legal institutions if it wants to prosecute Russian aggressors captured in its territory. 

From judges with conflicts of interest to alleged presidential interference, to backtracking corruption efforts, Ukraine must find a way to rectify its courts quickly. After a series of failed judicial reform bills, President Zelensky reconvened the Commission on Legal Reform. During the initial days of the Russian invasion, the Constitutional Court delayed major rulings, but now the Court seeks to prosecute individual Russians and perhaps even Russia as a whole for the crime of aggression. 

While negotiations on an ad hoc tribunal for the crime of aggression have garnered the majority of the media attention, Ukrainian prosecutors have forged ahead and begun domestic investigations while the international community determines the crime of aggression question. The Ukrainian criminal code prohibits the crime of aggression under Article 437. This includes “‘the planning, preparation, initiation and conduct’ of aggressive war, as well as ‘participation in conspiracy aimed at commission’ of such actions.” The Ukrainian code does not require the prosecuted individual to be in a position of leadership, unlike the Rome statute so even ordinary fighters and soldiers can be found guilty of aggressively waging war and the associated actus reus. 

The first conviction of the crime of aggression in the Ukrainian courts happened in May 2022, when 21-year-old Russian tank commander, Vadim Shishimarin was jailed for life after shooting an unarmed civilian, 62-year-old Oleksandr Shelipov, a few days after the invasion began. By July 2022, Ukraine’s prosecutor-general, Iryna Venediktova, and her office were investigating more than 21,000 war crimes and crimes of aggression allegedly committed by Russian forces. By March 2023, at least 26 war crimes suspects had been convicted by Ukrainian courts.

Before Russia’s invasion, national courts rarely saw aggression cases. Now, prosecutors are beginning to align Article 437 of the Ukrainian criminal codes to a more narrow scope, similar to the Rome statute. In the past, legislative attempts to bring Article 437 up the Rome standard failed. These prosecutions offer an interesting case study, as they show legal advocates conforming the code to international standards when the legislation and courts themselves have deprioritized doing so. Even with the Office of the Prosecutor General of Ukraine (OPG) sending guidance on standardized prisoner of war (POW) immunity, prosecutors seemed to be conforming to international humanitarian norms on combatant immunity fairly seamlessly.

Despite its corruption crisis, in February of this year, the Court issued a decision on an Article 437 case. It clarified who could be found guilty of the crime of aggression, further aligning Ukraine with international standards, rather than the criminal code’s broad definition. When the decision was released, 99 criminal aggression cases were registered, including cases against typical defendants, like military commanders, foreign intelligence service workers, and high-level state officials, but also including 30 “instigators of war” such as Russian singers and university rectors. While many–if not most–of these will take place in absentia, whether the Court can successfully rule on an atypical defendant’s crime of aggression poses an interesting challenge for the Court.

Additionally, Ukraine’s domestic prosecutors have an important opportunity to set a precedent for how the crime of aggression could be handled at national levels. This could set customary international law norms in an area that has seen little activity in the past century, which could be key to protecting the right to life. It is interesting to note that the list of potential defendants does not include notable suspects in aggression cases like President Putin himself and other members of the Troika. The Court seems committed, at least right now, to preserving the immunity of the Troika before its courts. It seems generally accepted that these personal immunities cannot be surpassed at a national level and will need some kind of extraordinary judicial response. 

 

This article is one of a seven-part series exploring the Russo-Ukrainian War. Zoé Tkaczyk is a J.D./MAIR candidate (May 2025) at the Syracuse University College of Law and Maxwell School of Citizenship and Public Affairs. This article series was inspired by sessions from the Carnegie-Maxwell Policy Planning Lab Fellowship: Postwar: Europe, Ukraine and the Future of European Order. Special thanks to Cora True-Frost and Alexa Connaughton for their guidance, feedback, and edits.

 

Cites:

BBC News – What is a war crime and could Putin be prosecuted over Ukraine? – 20 July 2023

Confronting Challenges and Avoiding False Dilemmas – 2 April 2024

Harvard Ukrainian Research Institute- Ukraine’s Constitutional Court Crisis, Explained

Just Security –  Prosecuting the Crime of Aggression in Ukraine and Beyond: Seizing Opportunities,