Son of 'El Chapo' Pleads Not Guilty in US Court

Joaquin Guzman Lopez faces drug trafficking and weapons charges; controversy surrounds arrest details

Guzman Lopez appeared in a Chicago court, pleading not guilty to a five-count indictment.
The arrest operation also captured Ismael 'El Mayo' Zambada, another top Sinaloa cartel leader.
Conflicting accounts emerge about whether Zambada was kidnapped or tricked into surrendering.
US and Mexican authorities are investigating the circumstances of the arrests.
Mexican President Lopez Obrador has called for calm among cartel factions to prevent violence.