In the opening scene of Lethal Weapon, we see Amanda Hunsaker high on drugs jumping off of a balcony to her death.
Her autopsy report states that she had taken pills laced with liquid drain killer and she would have died if she had not have jumped off of the balcony.
BURKE: Got some news on that Hunsaker case.
MURTAUGH: That was quick.
BURKE: So was the autopsy. You ready for this? They're not calling it a suicide.
BURKE: Surprise, surprise. First off, found evidence she took barbiturates.
MURTAUGH: Brilliant. There's an open pill bottle on her table
BURKE: Right, right. That's not the surprise. Surprise is someone doctored the pills. Every capsule was loaded with drain cleaner.
BURKE: If she hasn't jumped, she would have been dead within fifteen minutes.
Yes. L.A.P.D. definitely rules her death a homicide. Roger Murtaugh informs Amanda's father of the situation:
MICHAEL HUNSAKER: Murder?...but, I thought...
MURTAUGH: Poisoned. Even if she hadn't jumped, she would still be dead.
Why was her death considered a murder? Even though she inadvertently took pills with drain cleaner in them, her death was actually caused by blunt force trauma from her fall. How can they rule her death a murder on what was "going to happen"?