On this day, Feb. 7, in 1985, Enrique "Kiki" Camarena, an undercover agent for the U.S. Drug Enforcement Administration, was kidnapped by corrupt police officers in Mexico he discovered a marijuana operation valued at $8 billion.

After his disappearance, the DEA launched the largest homicide investigation in its history.

Camarena, 37, had been tortured extensively before he was murdered. His body was discovered a month later. Audiotapes showed that medical doctors kept Camarena alive for two days to continue the torture.

The media coverage of Camarena's case shed light on the violent world of drug trafficking.

His death also led to the Red Ribbon Week, which started in 1985 in his hometown of Calexico, Calif.

Today the Red Ribbon Week is the nation's oldest and largest drug prevention program.