I think it is better to Mirandize than to risk exclusion of his testimony later, if this was challenged.
Nothing that he said under the safety rule could be used anyway. It is strictly used for determining other threats..the way I understand it. They say they have plenty to convict him but with this bunch of left wing hacks at DOJ...it is doubtful.
Alan Dershowitz agrees...
Dershowitz insisted that authorities would come to “regret” not reading Tsarnaev his Miranda rights, partly because there was never any basis for the public safety exception, but, more significantly, because they may have “blown” their chances of getting a death penalty conviction. Why? Because they’ll need to be terrorist intentions, but the information they get may not be admissible in court.
This whole thing is confusing, to say the least.