How do you know they don't. There might not have been any commercial secrets of significant classification on there. Maybe he just didn't like the intimidation and the fact that they wanted to go through his private stuff without a warrant. They may also have planted anything they wanted in there once they got access.
He might also just not wanted random stabbed to be rummaging through his holiday snaps, sms, emails etc. Perfectly understandable if you ask me. Why is it any business at all of some random dude to be rummaging through you personal data?