Canadian authorities intercepted a U-Haul truck packed with 44 migrants near the Vermont border on Aug. 3, as human smuggling networks grow in sophistication along the United States’ northern frontier.

That case, now under investigation as a suspected human trafficking operation, captures a dangerous shift in smuggling routes as pressure mounts along the southern border.

Immigration attorney and former Connecticut Senate candidate Peter Lumaj, who has practiced immigration law for decades, told Fox News Digital that smugglers are constantly adapting to changes in U.S. enforcement.

“The smugglers are very sophisticated. They are able to read what’s happening in a certain country, whether it’s the United States, Canada, or Mexico,” he said.

According to Lumaj, smuggling rings often target single men, typically aged 18 to 35, who can physically endure the treacherous crossings.

“I have personally handled cases where people were abandoned in the middle of nowhere, on the verge of losing their lives, before they stumbled into Border Patrol officers begging for help,” Lumaj said. “Smugglers have no mercy. It’s about money.”

Smuggling groups have tapped into GPS tracking and social media channels to coordinate routes to evade border patrols. As Fox News Digital has previously reported, TikTok, Instagram and Facebook have all been used to lure desperate migrants with promises of safe passage.

Migrants cross the northern border between Canada and the United States. (Customs and Border Protection)

The difference between smuggling and trafficking, Lumaj said, is exploitation.