> He said the officer then confiscated his phone and laptop, and told him the items would be sent to a government lab which would try to crack his passwords and search his files. Hopefully they were powered down and used proper full-disk encryption.
Do you think its better to have an iPhone powered down or on? I am wondering if it would be possible to leverage remote wipe features, but maybe the border agents power off the device or put it in a bag / container that blocks cellular signals.
Look at it this way. Suppose the seizure of the phone was totally reasonable (because that is how they will think about it). Now, that suspected criminal who apparently had something to hide decided to remotely tamper with evidence after we lawfully detained it? That is subversion of justice!
The above is an argument I'd expect to hear from them.