Innocence until proven guilty. I don't want to live in a society where law is determined by emotions and personal bias, even if some criminals end up escaping justice.
Side note: I can't believe I feel the need to state this, but evidently it needs to be stated (from comments in this thread): these two drives where set up as part of a backup solution. They contain my personal data. They do not contain child pornography.
The prosecution was able to convince a judge that there is encrypted child pornography on those drives. The judge can't force a jury to accept that (a ruling of fact), but (s)he can make a ruling of law that the defendant no longer has a fifth amendment defense to producing a decrypted version of those drives.