@Indomitable Gall Re: I'm not sure you can make the its not porn argument
Caveat... IANAL and I don't know European laws...
While the defense lawyer can make the argument that this was a warrant-less search, it will fail and also that this was a violation of his 4th amendment rights also would fail. (It did).
First, the doctor called the tech company to send a tech out to fix his computer. Meaning that he, the doctor, initiated the request and gave approval for the tech to access his system. In doing his job, the tech came across an image which he thought to be child pornography. He then reported this to the authorities.
The defense lawyer is arguing that because the FBI pays a reward for the tip, the tech is acting as an agent of the FBI therefore he's doing a search on the behalf of the FBI and without a warrant. This fails the sniff test. Imagine you invite a police officer in to your house and there's a kilo of coke sitting on the coffee table. The officer doesn't need a warrant to arrest you because the cocaine is in plain sight.
Now you have a hypothetical. Suppose the good doctor actually encrypted the kiddie porn images and the tech asked him for the password to decrypt the files. Since this would not be part of his job, it could call in to question that the tech was doing an unreasonable search. Then the lawyers argument may hold water. Back to our police entering your home... if the kilo of coke was in a cupboard and not in plain sight... then he would need a warrant to search your home. His opening a cupboard on his own would be a warrantless search.
But back to reality. The judge didn't buy the 4th amendment argument and the case moved on.
Now the latest argument is that the photo turned in may not be considered child pornography. Therefore there was no evidence for the search. And this is where the arguments get interesting.
The tech sees the image, thinking it to be kiddie porn, alerts the authorities. They see the image, they believe it to be kiddie porn and get the warrant on good faith. Even if the image wasn't kiddie porn on a technicality... they got and served the warrant in good faith. The fact that one of the officers recognized that it was a still from a kiddie porn movie and could identify the victim... would be enough.
So this too shall fail.
But to your point... this wasn't a fishing expedition by any stretch of the term.
The employee was doing his job and saw a potential criminal act and alerted the authorities.
This guy did the right thing.
Where geek squad guys get in to trouble is when they go out, work on a computer and see a stash of porn pics and vids of the owner, and then make a copy and post them online. That is illegal and that's why you fire them.
A word to the wise... encrypt the folders where you stash your porn or other private stuff.