In her first appearance on the series, it was stated that Monroe had worked as a CSI in Bozeman for three years when she was sought out by crime lab supervisor Mac Taylor to replace the recently dismissed Aiden Burn, whom Mac had fired for tampering with crime-scene evidence. While, according to Stella Bonasera, her dedication and abilities in the lab first drew Mac's notice, she has since proven herself to be a good CSI in the field and also a competent interrogator. Danny called her 'Country Girl' when she exhibited her daring, tomboyish side during her first day at a crime scene. When she took down a much larger fleeing suspect by shoving him into the side of a car, Mac jokingly asked her, "What do they feed you in Montana?" Occasionally, Lindsay has put her life on the line when she believed there was no other alternative, such as going undercover as a jewelry store robber to save the life of a hostage.