John Sullivan was just promoted to Homicide detective, and it's time for him to go after the serial killer who took his mother's life. It's the first reason he joined the NYPD, after all. Frank Sullivan knew something was going to go down, he just didn't know what exactly. He mostly hoped it wouldn't be his brother's life.
Crossover - Frequency & Frequency - Rated: T - English - Mystery/Crime - Chapters: 1 - Words: 3,161 - Published: 6/23/2017 - John S., Frank S., Satch R.