A teen with no ID found beaten and apparently raped dies in ER.

A sexually assaulted drug user finds herself in hot water when a finger is found in her purse.

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.