Mixed feelings on this one
If the guy is going to host any kind of anonymising service he should be fully prepped to deal with the consequences, including getting legal advice over decryption keys for his personal laptop.
Yes the cops are probably over reaching going after his personal stuff, but I suspect the law (rightly or wrongly) is on their side. It would be in the UK.
Personally in his situation I'd be running something vanilla and innocuous and unencrypted on my personal laptop, with Tails on a microsd card up my butt* on a piece of string for anything iffy.
*other hiding places are available.
Speaking personally - since my daughters school was one of those affected, (plod stationed outside it all day afterwards) I hope he cooperates at his fullest with helping catch the morons who did this.