Normally there are two reasons for not revealing your password to authorities. One is you have something to hide. The other is just on principal. In this case since the authorities had him arrested for obstruction of justice, I would say he's got something to hide. Then again, I haven't read the article or done any digging on the subject. I watch a lot of Law and Order, Criminal Minds, and CSI.

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"BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Will he offer me his mouth? BOY: Yes. GIRL: Will he offer me his teeth? BOY: Yes. GIRL: Will he offer me his jaws? BOY: Yes. GIRL: Will he offer me his hunger? BOY: Yes. GIRL: Again, will he offer me his hunger? BOY: Yes! GIRL: Yes. BOY: On a hot summer night, would you offer your throat to the wolf with the red roses? GIRL: Yes. BOY: I bet you say that to all the boys!" -Meatloaf