How to nab a Mexico drug cartel kingpin? Track his girlfriend and a bit of US help

Mexican authorities located cartel leader El Mencho by tracking his girlfriend to his hideout, leading to a raid where he was fatally wounded and died during evacuation. El Mencho's death triggered violent CJNG cartel reprisals across Mexico, resulting in 30 cartel deaths, one bystander killed, and at least 70 arrests. US intelligence supported the operation, but no US military personnel were involved; Mexican President Sheinbaum urged calm amid ongoing tensions.