When a young woman's body is found, similar characteristics from past cases confirm that Chicago P.D. has a serial killer on their hands.

Intelligence investigates the actions of a private police force operating independently of the CPD.

A murder case remains cold for many years, until a detective's innovative method catches the killer.

Dateline interviews Judge Esther Salas on son's murder.

Two tenacious sisters determined to fulfill a promise investigate the mystery surrounding their mother's death.

Beth Lochtefeld had everything -- except the one thing she longed for --true love. And then she met her soul mate.

Surprising evidence is uncovered that sheds new light on the fire that killed Shay

The search for the serial arsonist leads Severide to meet face-to-face with an old enemy.