While she was standing in line, a CBP dog handler walked by Ms. Doe and hit the ground by her feet, but did not hit the ground by any of the others in the line. The dog responded by lunging onto Ms. Doe and landing its front paws on her torso.
Good grief, is every LEO "investigative" technique such total bullshit? If the dogs have been trained to alert when prompted to do so by the handler, they're really just a fig leaf for LEO discretion, which is rightly subjected to strict enough scrutiny to prevent "just search the Mexican lady, every single time". If the whole ridiculous expensive exercise of training and keeping dogs is a mere detour around such scrutiny, they're working a lot harder on that than they are on any of their stated objectives. One would like to think that LEOs might occasionally use a valid procedure, if for no other reason than by mistake, but one is eternally disappointed.