Attorneys representing Luigi Mangione have withdrawn their intent to argue that he killed UnitedHealthcare chief executive Brian Thompson while suffering from extreme emotional disturbance.This legal strategy shift follows an initial announcement by the defense team regarding their psychiatric argument for the December 2024 shooting in the city of Manhattan.The withdrawal means the defendant no longer seeks a potential reduction of murder charges to manslaughter as his state trial approaches this September.Prosecutors continue to build their case using a 3D-printed gun and a notebook while the defendant faces separate federal stalking charges.