Originally Posted by ApK
And, for the sake of argument, even if one WERE to accept that there is no reason to take the 5th unless you were guilty, it doesn't not necessarily mean that you are guilty of what you are being accused of at the moment.
You might well take the 5th to avoid incriminating yourself in some unrelated matter that the court isn't even aware of.
Apple isn't worried about what the DOJ wants to do about iBooks; they are worried about what they'll do about the *rest* of their business. Most notably iOS and the appstore.
This isn't the first case of collusion Apple has been involved in and if there are other "gentlemen's agreements" in place, an exec could easily find themselves admitting to further, unrelated wrong-doing.
We *could* start a pool on how many plead the fifth before the trial ends.