Earlier quoted context omitted.
I have always been curious.. is there a better way of accomplishing this?
Use full-disk encryption (presumably this is table stakes for anyone with this level of paranoia) using two factors - your passphrase decrypts a keyfile, then the keyfile is used to decrypt the partition. If you destroy the keyfile, then even knowledge of the passphrase won't allow you to decrypt the data. This can be used to defeat a rubber-hose attack [0]. Standard security vs. convenience trade-off applies, of cou…
IIRC, they were able to get his information by an elaborate scheme acted out by plainclothes police where they grabbed his PC while his computer was unlocked. Without looking it up, I think someone bumped into him and one officer took his laptop while another one on the other side grabbed his phone.