Julio Cesar Chavez Jr. shared a boxing ring with Jake Paul last weekend, but the former boxing champ is now in a jail cell ... after ICE Agents tell us they arrested Chavez Jr. for a warrant in Mexico, as well as connections to the cartels.
Officials from the Department of Homeland Security tell TMZ Sports that 39-year-old Chavez Jr., the son of boxing legend Julio Ceasar Chavez Sr., was detained ... and currently being processed after being taken into custody in the Los Angeles area.DHS
