Ends don't make a means. After reading everything he indeed legal if he truly made efforts to return the laptop which i question. Lets say that is correct we have to question the motivation. If he made copies knowing what they contained because he was against it, its breach of privacy. The fact that the breach of privacy occurred first should render all further evidence moot. If cops illegally search your house and find a dead body that dead body should never be used to convict you of any crime.
Sorry, but your legal training and deductive reasoning skills are ridiculous.
There was never an illegal search. Ever. The new owner of the laptop surrendered it to the FBI.. FBI did not conduct an illegal search for the laptop. If Hunter wanted privacy, he should have used full disk encryption. Every organization with sensitive or personal information in need of protection knows to use those encryption programs. In fact, there are free versions available. Giving someone an unencrypted drive in no way offers an expectation of privacy.
I never let a hard drive/SSD out of my control. When I sent a laptop to Dell for repairs, I replaced the boot disk with a newly imaged disk. That ensured the disk had no private or proprietary info on it, because (1) Dell may have had to re-image the disk, (2) they may have needed to put a new disk in, or (3) they may have replaced the entire PC, disk included.
Since we had encryption on our laptops, that alone required that we re-imaged the disk. Otherwise, it prevents Dell from accessing the disk with utilities that might be needed to troubleshoot and repair the system.
So many things Hunter did wrong. Nothing the shop owner and FBI did wrong.