Leonid Greyser is a Russian man from Moscow who gained media attention in 2019 after being accused of killing his 21-year-old sister, Ariada Korol. Leonid Greyser claimed she was possessed by demons and said he was trying to “set her free.” Due to his erratic behavior and mental health issues, the court ruled him unfit for trial and ordered psychiatric treatment instead of prison.
Leonid Greyser: The Shocking Case of a Russian Man Accused of Killing His Sister
Leonid Greyser’s stated intention behind killing his sister, Ariada Korol, was rooted in his firm belief that she was possessed by malevolent demons. According to Leonid, his actions were driven not by anger or personal animosity but by what he perceived as a desperate need to “set her free” from these evil forces that he believed had taken control over her mind and body.
This disturbing conviction revealed the depth of his mental turmoil, as he was unable to separate his delusions from reality. Greyser’s mindset reflected severe psychological distress, which influenced his behavior before, during, and after the crime. His belief in demonic possession was so overpowering that it justified, in his mind, an extreme and tragic act of violence.
This intention highlights the complex intersection of mental illness and criminal behavior, raising important questions about how such cases are understood and managed within the legal and psychiatric systems. The case also exposed broader societal challenges around mental health awareness, treatment, and the stigma that often surrounds individuals suffering from severe psychological disorders.
Who Is Leonid Greyser? Wikipedia, Age & Arrested
Leonid Greyser is a murderer of his own sister, Ariada Korol in 2019. Leonid Greyser was arrested shortly after the brutal killing of his sister, Ariada. When authorities arrived, they found Greyser acting erratically and uncooperatively, raising serious concerns about his mental health.
Leonid Greyser has become one of the trending topics on the internet. Many people are searching for his Wikipedia page and biography details. However, Leonid Greyser is yet to be featured on the Wikipedia page.
The murderer was born and raised by his parents in Moscow, Russia. The identity of his parents is unknown in the media. Leonid loves to keep his personal life a secret and avoid the media’s eyes. Furthermore, he grew up with his sibling sister, Ariada Korol. Sadly, he killed his own sister.
Leonid Greyser was born in 2001, making him 24 years of age as of 2025. However, his actual birthdate, age, and zodiac sign remain a mystery. Furthermore, Leonid holds Russian nationality and belongs to a Mixed ethnicity. In addition, he follows the Christian religion.
His approximate height is around 5 feet 10 inches or 1.77 m tall, and he has a decent weight of about 74 kg or 163 lbs. There is no information available about his educational background.
Where Is Leonid Greyser Now?
As of 2025, Leonid Greyser is still undergoing compulsory psychiatric treatment after being sentenced by the Shcherbinsky District Court in Moscow back in 2020. Because of privacy laws in Russia, there aren't many details available about where exactly he is or how he’s doing. His condition and treatment are regularly reviewed, but this information is kept private and hasn’t been shared with the public.