Law & Order: Special Victims Unit (1999) : 7x10

When a teenager and her younger sister end up in the hospital after a day at the park, detectives learn that both girls were abducted from New Orleans after Hurricane Katrina along with a third sister who is still missing. Despite the interference of a local reporter, Jackson Zane, detectives are able to catch the kidnapper, a known pedophile, and recover the girl, but when Alvin Dutch dies and the autopsy determines it was Anthrax, Benson puts everything on the line so that she can get the truth out there.