Who is the true killer in Basic Instinct?

Catherine Tramell, created by writer Joe Eszterhas, is played by Sharon Stone in both films. In Basic Instinct, directed by Paul Verhoeven, Catherine Tramell is a serial killer and love interest of detective Nick Curran; Basic Instinct 2 pairs her with the similarly troubled British psychologist Michael Glass.

Is Catherine Tramell a psychopath?

Glass goes on to describe Tramell as “narcissistic” and a “pathological liar”. Various characters throughout Basic Instinct 2 describe her as a psychopath with narcissistic personality disorder. She displays heavy borderline features and traits in addition.