Interesting episode, with Detective Eames filling in for Wheeler, who goes into labor in Captain Ross's office. I would have liked them to have brought back Alicia Witt, since they are going to have to invent reasons for Goren to be absent every other week so that Eames can work with Nichols.
We learn that Nichols and Captain Ross were partners some time in the past, and that Nichols nearly got Ross suspended for a month.
In response to another review, from the very first season, Law & Order: CI has often shown the killer at the beginning of the episode. The original idea, before Vincent D'Onofrio took over the show, was to show the crime from the criminal's perspective. You can't do that without showing the crime.