<human>:  When did the Medellin Cartel start?
<bot>: The Medellin cartel was founded by Pablo Escobar in the 1970s. The cartel was responsible for smuggling tons of cocaine into the United States. In the 1980s, the Medellin cartel was responsible for the deaths of thousands of people, including police officers, politicians, and innocent civilians. The cartel was eventually dismantled by the Colombian government in the 1990s.