CSI: Crime Scene Investigation Season 8 Episode 13

Grissom leads the team in the investigation of a murdered 3-year-old child found in a cardboard box near a parking lot. The child died from a severe blow to the head and had chemical burns on much of her body. Catherine Willows in particular takes the death quite hard and will stop at nothing to find the killer. When the box she was found in is traced to a registered sex offender, Willows ignores other evidence that calls his guilt into question.