No Bolstering?
Posted: Mon Aug 24, 2009 7:43 am
Does anyone have the cites to the cases mentioned in the Detail:
At the trial level, trial judges have huge amounts of discretion to rule as they see fit on evidence issues -- if the trial judge wants to allow testimony about standard procedure, that includes the concept of verification, but bar the statement that it was done in this case by a named person, I don't see why he or she can't do so. I'm not sure, tactically, how much that helps the defense -- jury is likely to infer that if expert testified to the standard procedure, that it was followed and there was a verification.
I do see problems is with confidence statements -- a form of self-bolstering. Witness says "yes, that's a match. I'm 100% sure." Again, also not likely reversible error, but could be subject to a motion in limine before the trial or an objection at the time. There's some case law about links between confidence and accuracy in the eyewitness ID context that could be conceptually imported -- court shouldn't care if you're 100% sure, it should care about why your answer is reliable.
Reversal -- unlikely if sua sponte by the witness, unless the witness had expressly been told not to do it by the judge as a result of a motion in limine, and did it anyway. It is very, very hard to get an appellate court to find reversible error in witness conduct, even that of an experienced witness. It would also likely require a prosecution case that was otherwise quite weak.A few recent court decisions, have applied the “no bolstering” rule in cases wherein fingerprint examiners were asked, after they explained the various steps involved in the ACE-V process (including the requirement of a Verification), whether the “verifying examiner” agreed with the testifying examiner’s conclusion, and the examiner responds affirmatively. The same result – reversal of a conviction – is likely to occur if the testifying examiner were to volunteer such information on direct examination without being asked that question.
At the trial level, trial judges have huge amounts of discretion to rule as they see fit on evidence issues -- if the trial judge wants to allow testimony about standard procedure, that includes the concept of verification, but bar the statement that it was done in this case by a named person, I don't see why he or she can't do so. I'm not sure, tactically, how much that helps the defense -- jury is likely to infer that if expert testified to the standard procedure, that it was followed and there was a verification.
I do see problems is with confidence statements -- a form of self-bolstering. Witness says "yes, that's a match. I'm 100% sure." Again, also not likely reversible error, but could be subject to a motion in limine before the trial or an objection at the time. There's some case law about links between confidence and accuracy in the eyewitness ID context that could be conceptually imported -- court shouldn't care if you're 100% sure, it should care about why your answer is reliable.