I've been stuck in the wrong lane there and almost made the same turn. Had to literally stop in traffic and wend my way to the correct lane depending on other drivers to let me by. I sympathize with the driver.
Yep, there's places like that where if ya didn't know YOU ARE ABOUT TO ENTER MEXICO or didn't realize ya just couldn't turn around and come right back those unfamiliar might drive right in. That same prospect concerns us every time we drive to any of all those Texas Border communities where the downtown area sits right on the river, with the bridge right there. As in make a left and go 100 yards you're in Mexico.
That part of the story is plausible, so is the concept of packing the load low on account of the weight. Dunno how much it was "hidden", for that we are taking the word of the Mexican Federales via the MSM.
Both the shipper and the customer sound legit too.
Whatever the circumstance, Ol' Akeem is in for a world of hurt, there's been Americans in the past detained for months or years down there, for mere handfuls of sporting ammo inadvertently left in the trunk.
Birdwatcher