Do you just like to post BS to scare folks, Barry?
I recognize and understand the detection equipment used at Border Patrol DHS checkpoints very well, having been recently subjected to them (and more) in an active combat theater.
You said: If you just had an X-Ray, you have to explain that to them. Your Dr. should have given you a "hall pass" to get past them.... They WILL call and talk to your Dr. before they let you go. You'd better hope he's not playing golf without his cell phone, or you could be there awhile.....
That's completely different than ...the note my father had to present to BP at the checkpoint coming back from Las Cruces to where he lives after recieving medical radiation.
X-rays will not leave any traces of radioactivity to be detected. An X-ray machine is the equivalent of a spotlight, just in a different spectrum of light. It doesn't leave any residue and can't be detected after the fact by a radiation detector any more than a light meter would get a reading off of you in the dark after the spotlight had been turned off. That's just basic science that you are old enough to have learned in high-school. It can't happen, it's a physical impossibility, so stop trying to cry wolf and scare people.
Radioactive isotopes injected into your blood stream (medical radiation) are something else altogether and WILL show up (for a while), not because your body has been turned radioactive, but because you have radioactive particles inside your body (until they are flushed out).
The number of patients that are injected with radioactive isotopes vs the number that get x-rays is what, 1,000:1? To "warn" guys that they are going to need a note from the doctor to get past a check point if they've had an x-ray is irresponsible at best.
Again, cite the case law and court decisions where the courts have upheld that A warden out here can also search your residence without warrant if they believe that you are holding "Fruits of the Crime", and anywhere any court has said that warrant-less drive by searches would be legal or admissible in court,
as in a big white truck drives down your street and sniffs out your gunpowder for reloading, or detects how many guns you keep in your home, and how much ammo you have for each gun? What will they use the information for? All perfectly legal. They are indeed "searching" without warrant in those cases, aren't they?
Most of what your link says is pretty much what I said about warrant-less searches, and even expands on it:
Unless the fact-pattern fits one of the six exceptions discussed above, a warrant is required for police to conduct a search or seizure. Note that for Exception 1, search incident to a lawful arrest, and Exception 5, the automobile exception, although no warrant is required, there is a probable cause requirement. For a search incident to a lawful arrest, the officer must have had probable cause for the original arrest. If the original arrest was unreasonable or unlawful, the evidence discovered from the search will be excluded as fruit of the poisonous tree (see the subchapter on the Exclusionary Rule). For the Automobile Exception, the officer must have probable cause to believe that the vehicle contains evidence of a crime, instrumentalities of a crime, contraband, or fruits of a crime, whether the vehicle is moving or already stopped. Exception 4 ("stop and frisk") does not require probable cause, but does require "reasonable suspicion." Only Exception 3 (consent) requires no grounds on the part of the police for making the search.
It's okay for your mileage to vary, but it ought to be somewhere within reaching distance of reality.