CSI: Crime Scene Investigation, Season 1

Catherine:
So you did the tox screen on my carny?

Greg:
Roger that. You know, I have seen guys drink, like, five gallons of water to try and dilute their urine. It's the old straight flush. But all bad boy Sanders has to do is just test their specific gravity and-- blammo! -- I can still catch their toxic butts.

Catherine:
Mm-hmm. So?

Greg:
So your guy didn't do that.

Catherine:
Great. What did he do? Try and mask it?

Greg:
No.

Catherine:
Oh, come on. That creep tested clean?

Greg:
Yeah. For someone who's on the pill.