In 1987 he worked as a patrolman and arrested a man named David Zifrin for kissing a girl and parents filed criminal charges. Torrelli later coached Zifrin on how to act so they would show leniency and Zifrin was plead down to sexual misconduct.
In 1993, Torelli started working the high profile murder case of a nurse named Mary Davis. When another nurse named Victoria Hemmings was murdered the same way and another nurse, Aloma, barely survived in Manhatten with Briscoe and his partner Mike Logan working the case, Torelli called Zifrin. He convinced Zifrin to confess to both murders to make people think he was smart. He ignored potential evidence that could clear him and he was later found guilty of Mary's murder.
When the real killer, James Lee Pawl, was identified, the cover-up is exposed and Zifrin admits that Torelli coached him and even showed him photographs of the crime scenes. Torelli was later arrested for suborning perjury and obstruction of justice while Lennie watched in disgust. (L&O: "Jurisdiction")