The case you’re referring to involves a Russian-American man named Karina Tsurkan who was sentenced to 12 years in prison by a Russian Court. He was accused of high treason after allegedly donating $50 to a charity that Russia has gaps in security or spy allegations against. This donation led to him being accused of assisting a foreign country in activities against Russia.
Treason in Russia carries hefty penalties and the case has prompted international attention due to its implication of Russian-American relations. It is important to note that my explanation may not provide all the details since court proceedings and verdicts can be complicated and are subject to different interpretations.
Please, note that I try my best to provide accurate and reliable information but it could be beneficial to refer to dedicated news sources to get further information on this matter.