(CNN) Former guerrilla leader Rodrigo Londoño led thousands of Marxist rebel troops to surrender their weapons last year, ending years of armed struggle in Colombia.

And now, he wants to be Colombia's next president.

Londoño -- better known by his guerrilla alias "Timochenko" --- was the top leader of Colombia's most powerful guerrilla force, FARC, throughout the group's lengthy peace negotiations with the government. But he has also been accused by the was also accused by US State Department. of controlling the FARC's cocaine operations and "the murder of hundreds of people."

US officials have offered a $5 million reward for information leading to his arrest.

Supporters dressed in white shirts gathered Saturday in Bogota's neighborhood of Ciudad Bolivar, carrying posters with Londoño's photo as he officially announced his presidential bid.

Read More