Although she possessed a deep well of strength, Lindsay was a character marked by emotional struggles that were a result of her tough upbringing. In the season 4 finale, “Fork in the Road,” Lindsay found herself once again attempting to keep her mother, Bunny (Markie Post), out of trouble.
While already facing disciplinary actions related to her treatment of a suspect, Lindsay learned that her mother s embroiled in some serious legal trouble. Eventually, evidence was found linking Bunny to a pill-selling operation that had resulted in the overdoses of multiple teenagers, as well as the shooting death of her boyfriend. The discoveries forced Lindsay to make a drastic decision to keep her mother out of trouble. As part of a deal to keep Bunny out of jail, Lindsay took a job with the New York City FBI bureau.
The final shot we saw of the character was Lindsay receiving a call from her own boyfriend, Detective Jay Halstead (Jesse Lee Soffer), who was planning on proposing. Although Lindsay was originally slated to reappear on the series in a guest capacity to tie up the loose ends of her storylines, that was the final time she was seen on any of the shows in the franchise. When Bush went public about why she left the show, it became clear why.
Written by: Looper