BLEACH

Spoilers for those who haven't seen tonight's CSI season finale.

We all know that bleach is the trigger for the killer, and it can be found at each crime scene. But have you realized that each killing is forming the word "bleach"?

Blunt force trauma;
Liquid nicotine poisoning;
Electrocution;
Asphyxiation;
Crushed under a Car;
H is the only one that's left. I assume Natalie (the Miniature Killer) will hang herself in jail when the janitors use bleach near her cell.

EDIT: I wish I could take credit for noticing this, but I didn't. I can't recall who it was, but someone on one of the many CSI wikis or messageboards came up with the idea first.

Kudos to you, sir.