Impact x Nightline — Episode 14: Kill Code: Black Dahlia & Zodiac - Two Cases, One Killer?

You are watching the episode Kill Code: Black Dahlia & Zodiac - Two Cases, One Killer? The Zodiac and the Black Dahlia murders: Two of America's most notorious unsolved mysteries. Could it be the same killer? Following a trail of cryptic clues, an amateur sleuth now says he’s cracked the code on both cases.