In a tragic turn of events that shook New York's high society, Thomas Gilbert Sr., a 70-year-old male and wealthy hedge fund founder, was found dead in his Manhattan apartment on January 4, 2015. He had been shot in the head. The scene was initially staged to appear as a suicide, with the gun resting on his chest.
The victim's son, Thomas Gilbert Jr., a Princeton University graduate, was quickly identified as the prime suspect.
His mother, Shelley Gilbert, discovered her husband's body and, in a harrowing 911 call, identified her son as the perpetrator. Gilbert Jr. was arrested and subsequently charged with second-degree murder and criminal possession of a weapon.
The motive for the killing appeared to be financial. Prosecutors argued that Gilbert Jr. was enraged that his father had decided to reduce his weekly allowance. The unemployed son was financially supported by his parents, and the reduction in his allowance was reportedly an attempt to encourage him to seek psychiatric help for his escalating mental health issues.
During the trial, the defense did not dispute that Gilbert Jr. killed his father but argued that he was not guilty by reason of insanity. His lawyers presented evidence of a long history of mental illness, including diagnoses of paranoia, depression, and obsessive-compulsive disorder. They contended that he was too ill to understand the consequences of his actions.
Despite the defense's arguments, the prosecution maintained that the murder was a calculated and vengeful act. They presented evidence that Gilbert Jr. had planned the killing. In June 2019, a jury rejected the insanity defense and found Thomas Gilbert Jr. guilty of second-degree murder and two counts of criminal possession of a weapon. He was later sentenced to 30 years to life in prison.
