- Kelly Severide: The medical examiner found no traces of smoke in Brad Whittier's lungs, only water. Looks like the killer drowned him in a tub and then torched the place.
- Wallace Boden: You send all this to our friend in Milwaukee?
- Kelly Severide: Yeah, and Seager's referring the arson to CPD, so you'll be glad to hear I'm focused on Squad again 100%.
- Wallace Boden: This peracetic acid, you know what it's used for?
- Kelly Severide: Cleaning supplies. We thought it pointed toward the janitor, but it...
- Wallace Boden: It's also used for sterilizing medical equipment. Now, didn't Detective Lamar say that our victim was in Milwaukee on some kind of medical trade show?
- Kelly Severide: Yeah, he did. Brad Whittier worked for a company called... Hollette Industries.
- Wallace Boden: Hollette. Yes, they sell medical supplies. Now, who's more likely to have peracetic acid on hand, a gangbanger or a medical supplies sales rep?
- Kelly Severide: So maybe one of Whittier's coworkers is all wrapped up in this, and that's who he was so afraid of. Look, Chief, I know I just...
- Wallace Boden: Go. I'll cover you.
- Kelly Severide: Thanks.