A deadly drugs cartel 's spy network has been exposed after police uncovered hidden cameras tracking their every move. Federal authorities in Culiacán, Mexico were stunned this week to discover an undercover surveillance centre manned by members of the powerful Sinaloa Cartel . Alongside a cache of weapons, officers found five screens streaming live footage from cameras placed in strategic areas around the city, including main boulevards and key avenues. Each screen displayed as many as 30 live