The legal team of Alessandro Mangione, the 34-year-old former hedge fund analyst accused of the murder of tech entrepreneur Julian Vane, has formally notified the court of their intention to pursue a psychiatric defence. The filing, submitted late on Monday to the New York State Supreme Court, signals a marked shift in strategy after months of procedural motions.
Mangione stands accused of the August 2023 shooting of Vane outside his Manhattan apartment. Prosecutors allege Mangione, who had lost heavily in a venture capital fund managed by Vane, stalked the victim for two weeks before carrying out a premeditated attack. The indictment includes charges of first-degree murder and criminal possession of a weapon.
Defence counsel, led by prominent attorney Helena Torres, argues that Mangione was suffering from a severe mental illness at the time of the killing. In a 45-page expert report filed under seal, two forensic psychiatrists conclude that Mangione’s judgment was impaired by paranoid delusions related to his financial ruin. The report cites a history of hospitalisation for bipolar disorder and a documented medication lapse in the weeks before the shooting.
Legal analysts note that the psychiatric defence is a high-risk tactic in New York, where the standard for a successful insanity plea is notoriously narrow. Under state law, a defendant must prove that, due to a mental disease or defect, they did not understand the nature of their actions or that they were wrong. The prosecution is expected to challenge the credibility of the psychiatric evidence, pointing to Mangione’s meticulous planning and attempts to conceal his identity.
District Attorney Rachel Okoro called the defence motion a “predictable ploy to evade responsibility” and vowed to present evidence of Mangione’s rational behaviour in the weeks before the crime. “The defendant purchased a burner phone, wore a disguise, and waited for the victim in a carefully chosen location,” Okoro said. “These are not the actions of a person incapable of understanding right from wrong.”
The trial, previously scheduled for February, is now likely to be delayed while the court considers the admissibility of the psychiatric report. Judge Eleanor Briggs has set a hearing for 17 December to discuss the procedural implications. Meanwhile, Mangione remains held without bail at Rikers Island, where he has been under suicide watch since his arrest.
The case has drawn intense media scrutiny, focusing on the intersection of wealth, mental health, and violence. Vane’s family issued a statement calling the psychiatric defence “an insult to the memory of Julian” and expressing confidence that the justice system would hold Mangione accountable.
As the legal arguments unfold, the broader question of how the justice system handles defendants with documented mental illness is once again thrust into the public domain. For now, all eyes remain on Judge Briggs’ December ruling, which will determine the trajectory of a trial already freighted with complexity.
