CSI: Miami, Season 10

Frank:
Well, the driver's sober. He said he didn't see the victim in the alleyway.

Horatio:
We got a cause of death?

Dr. Tom Loman:
Her cervical vertebrae and lateral malleoli are crushed.

Horatio:
So she's got a broken neck.

Dr. Tom Loman:
Not exactly. These injuries suggest she was already on the ground when run over. And look... frothing. And... ocular miosis.

Horatio:
Which tells you what?

Dr. Tom Loman:
These are all symptoms of being poisoned by a nerve agent. Odds are, she was already dead when the car hit her.

Horatio:
So what you're saying is the car was unrelated to her death.

Dr. Tom Loman:
She's cyanotic. I'd say she was poisoned minutes ago at most.

Frank:
Maybe the killer's still inside, Horatio.

Horatio:
Frank, lock it down. Nobody leaves.