Gustavo Petro
Petro studied at the Colegio de Hermanos de La Salle. He founded the student newspaper Carta al Pueblo ("Letter to the People"). At the age of 17 he became a member of the 19th of April Movement. During his time in 19 April Petro became a leader, and was elected ombudsman of Zipaquirá in 1981 and councilman from 1984 to 1986. In 1985, Petro was arrested by the army for the crime of illegal possession of arms. He was convicted and sentenced to 18 months in prison.