Cold Case Season 4

Smart, driven Detective Lilly Rush of the Philadelphia homicide squad works on "cold cases" - crimes that have never been solved - by reopening dormant murders that occurred years or even decades ago. This experienced detective is intrigued by interrogating witnesses to old crimes whose lives and circumstances have since changed, making use of today's new science and finding fresh clues to cases once thought unsolvable.

At the same time, she is prepared for certain consequences, namely that her work will open old wounds and may lead suspects to commit new crimes. Nevertheless, Rush makes it her business to ensure that no victim is ever forgotten.