I never really understood the reason for seizing an electronic device anyway. Surely if something was important / secret enough it wouldn't be _on_ the phone. What are they looking for, exactly?
I’m sure there are tons of phones that have incriminating photographs in the default camera app, or incriminating text messages or saved voicemails or who knows what.
Probably anything incriminating. Human nature is laziness so if the guy was a baddie then there's a high chance something could be on the devices.
According to the moral sense or The Law? As in "Three Felonies a Day". Because gestapo doesn't have too much interest in the former.