Criminal Minds (2005) - 2x09 - The Last Word

Gideon, Hotchner and their team investigate two serial killers in St. Louis who are competing to outdo each other.

As the body count rises, the Behavioral Analysis Team sets a trap to apprehend the serial killer known as the "Mill Creek Killer" (O'Mara). Based on that killer's profile, their plan, once they have him in custody, is to make his arrest a media event in order to capture the other serial killer and bring him to justice as well.