Lester Holt reports on how the investigation into the murder of four-year-old Barbara Jean Horn.

When a Kansas prisoner escapes with the help of a prison volunteer and mother of two, investigators scramble to track the pair down.

A call to a boarding school leaves Severide questioning himself and Dawson’s training is put to the test.

Firehouse 51 will forever be changed.

For more than 30 years, Ohio investigators have searched for answers in the murder of 10-year-old Amy Mihaljevic.

To find her niece, Lissa Yellow Bird worked the phones and posted on social media.

Detectives Benson and Stabler investigate a male stripper linked to an accidental murder.

When a pregnant woman has her baby stolen from her womb, it's a race against time to find the baby alive.