Mental illness doesn't comprehensively eliminate culpability. The mental illness would have to explain why the act wasn't murder. Such as: the defendant was una

Mental illness doesn't comprehensively eliminate culpability. The mental illness would have to explain why the act wasn't murder. Such as: the defendant was unable to foresee the act would cause death; the defendant believed they were acting in self defence. In this case someone with a history of mental illness still premeditated to commit a political assassination.