Law & Order: Criminal Intent (2001)

S2E6 Malignant

A tragic heist results in two deaths, prompting an investigation that uncovers a prolonged scheme of drug manipulation. Detectives Goren and Eames are tasked with unraveling the mystery behind a pharmacist who has been watering down cancer treatments. They face the challenge of building their case without resorting to exhuming the bodies of affected patients who received the compromised medication.