Lark Madison was a student in teacher Frank Scanlon's class. When he noticed a bruise on her arm, he had her taken away from her abusive mother, and let her move into the Scanlon home. She quickly made friends with Jake Marshak; the two slept together. When he learned she was underage, he angrily broke it off. Lark had a crush on Frank; when he began exhibiting wild behavior due to medicine which saved his life after he fell off the roof (saving Lark), he manipulated Lark's affections so she would do his dirty work for him. He eventually cleaned up his act, and adopted her as a daughter.

Lark was a suspect in the General Homicide murders. Around the time of the investigation, Lark visited her mother in the sanitarium. She was found dead after angrily lashing out at Lark. Frank's girlfriend Julie, and Greg Cooper were the culprits behind the murders. Lark has been away at college for a few years, and is rarely, if ever spoken of.