Rodney Alcala was a predator who hid behind a charming smile and a camera lens. He posed as a photographer to lure victims, amassing hundreds of photos of unidentified women and children — some believed to be victims never discovered. In 1978, he even appeared on The Dating Game and won, all while actively m!rdr!ng. Behind his TV charisma was a calculating k!ll*r linked to at least eight confirmed victims — though investigators believe the number may exceed 100. His double life stands as a chill

A notorious serial killer makes a winning appearance as a contestant on a popular dating show. 20/20's latest full episode "The Dating Game Killer" is streaming now from ABC. https://abcn.ws/3s4kgCR | ABC 20/20

Rodney Alcala is believed to have murdered over 100 innocent people… and he did it right in front of our eyes. The true story of the Dating Game Killer starring Guillermo Diaz and Carrie Preston premieres TONIGHT at 8/7c. Only on Investigation Discovery. | Investigation Discovery