JScott,
I was not and am not attacking you. I find you to be an intelligent man with sound ideals (mostly). I would not hesitate to make you part of my defense team if needed. I do agree that an expert witness would compliment a defense attorney.
I took issue with your advice to give a brief statement. If I were an expert witness, like yourself, I might feel confident enough to do so. As an average citizen I am not comfortable standing on my own, in possible opposition to a team of professional law enforcement officers trying to close a case.
You mentioned through clever questioning, a detective on the stand can let out that the accused invoked the fifth. That's what judges are for, to uphold the spirit of the law and prevent prohibited evidence/info from entering on a technicality. As a non-lawyer, I would suppose a good defense attorney could conference in private with the judge and DA and have the judge enforce, that in no way, is the accused using his rights granted under the BOR, to be revealed in open court.
In closing I'd like to say I find your advice to the general public, to speak up without an attorney, to be...