CSI: Miami (2002)

S1E8 Slaughterhouse

Horatio and his team are tasked with investigating the horrific massacre of a family within their residence. The sole witnesses are a blood-stained toddler and the father, who is fighting for his life in surgery. While initial suspicions point towards the mother, attributing her actions to post-partum depression, the investigation reveals a more complex truth as new evidence comes to light.