A tragic and disturbing case from Pennsylvania has come to a close with a 29-year-old man, G. Siosko, being sentenced to nearly 30 to 60 years in prison.
He pleaded guilty but mentally ill to the murder of his 67-year-old grandmother, M. Finlay, along with charges of arson and making terrorist threats. The sentencing happened on May 9, 2025, in Judge Chelak’s courtroom.
What Happened?
In April 2024, emergency services were called to a fire at a home in Pennsylvania. When firefighters arrived, they found Siosko at the front of the house, covered in blood. He was acting aggressively and threatened anyone who tried to come near. Once the fire was put out, the body of the victim, his grandmother, was found in the kitchen.
Cause of Death
After conducting an autopsy, doctors confirmed that the elderly woman had died from both sharp and blunt force injuries. Investigators later confirmed that she had already died before the fire started. This made the case even more serious, as it involved both murder and arson.
What Did the Accused Say?
During questioning, Siosko admitted to killing his grandmother. He told police that he believed she was applying harmful flea medicine to her pet and that he had to stop her. He also said things that showed signs of serious mental illness, like “She was the devil, and I had to do it,” and talked about using the “holy spirit and fire” to kill the devil.
Mental Health and Trial
Initially, doctors said that Siosko was not mentally fit to go to trial because he had been diagnosed with schizophrenia. However, after more treatment and another check-up, he was later found to be mentally fit enough to face charges.
In March 2025, Siosko officially pleaded guilty but mentally ill. This means he admitted to the crime, but also that he was dealing with a serious mental health condition when it happened.
The Sentence
Judge Chelak sentenced Siosko to serve between 29.5 and 60 years in prison. The judge took into account both the seriousness of the crime and Siosko’s mental illness. The court also heard emotional statements from the victim’s family, who are still deeply grieving.
District Attorney Tankin, who led the prosecution, said the case was especially painful because the victim was a loving family member who didn’t deserve such a violent end.
Community Reactions
The case has left many in the local community shocked. Neighbours said the victim was a kind and gentle person. Mental health advocates say the case also highlights the need for better mental health care and early intervention.