Redeploying Homeland Security Investigations agents is part of a broader Trump effort. But some fear many serious transnational crimes will go unprobed.

Claudia Sheinbaum said the U.S. Justice Department itself has recognized that "74% of the weapons" used by criminal groups in Mexico come from north of the border.

A U.S. CBP officer allegedly involved in migrant smuggling on the Texas border was a member of a Mexican drug cartel, a federal agent testified.

The Mexican government admitted they have incomplete information about U.S. military missions over the southern U.S. and the ...

The U.S. military is increasing its airborne surveillance of Mexican drug cartels to collect intelligence to determine how to ...

Aerial surveillance of the cartels has increased, with at least 18 spy plane missions flown over the Southwest and near Mexico.

Security forces in Mexico have arrested a pilot they suspect of working for Los Chapitos, the Mexican cartel run by sons of ...

Brown said DEA and Homeland Security Investigations (HSI) personnel must intensify their investigations into underground tunnels to discover “cover-ups” of the tunnels’ US exits. “Cover-ups” are ...

The U.S. Drug and Enforcement Agency could hire informants to reveal where Mexican drug cartel tunnel "cover-ups" are located ...

U.S. Immigration and Customs Enforcement’s Homeland Security Investigations arrested a member of the Cartel del Golfo on Feb.

Some of the US’s most sophisticated spy planes that typically monitor the Chinese and Russians are now flooding the air ...