A murder unearths an unsolved mystery

A mom finds a note from her daughter

Tensions between squad and truck begin to boil over threatening to divide the house, while Casey goes undercover.

Boden takes charge as divisions continue to threaten the cohesion of the house in the season finale.

The attempted suicide of a 14-year-old girl leads to her family, promiscuity, and her regression to a child.

The body of a baby girl is found inside a cooler.

Intelligence hunts a vigilante who is torturing and murdering pedophiles.

Lindsay must navigate around CPD politics when her mother is implicated in a murder case.