Would you by chance have a link to the statistics that back this? I'm seriously very curious, more so about how easy it is to "mess people up on the stand." I've certainly heard of the innocent being found guilty due to all sorts of things, but never really that it was directly a result of the defendant being messed with on the stand (and by this, I'm assuming you to mean messed with the way you perceive Nel to be messing with OP).
Appreciated.
False confessions and incriminating statements lead to wrongful convictions in approximately 25 percent of cases. Looking only at the homicide cases, false confessions are the leading contributor to wrongful convictions, contributing to 64 (62%) of the 104 homicide wrongful convictions that were overturned by DNA evidence, where as misidentifications contributed to only 32 (31%) of the homicide wrongful convictions. Twenty-nine of the DNA exonerees pled guilty to crimes they did not commit. The Innocence Project encourages police departments to electronically record all custodial interrogations in their entirety in order to prevent coercion and to provide an accurate record of the proceedings.
http://www.innocenceproject.org/Content/DNA_Exonerations_Nationwide.php
These stats are higher than the last time I looked.
So if you can actually get someone to falsely confess to a crime they didn't do, it shows how easily people can be messed up. That is my point. And, I expect a skilled prosecutor to mess up a witness on the stand so badly that they don't know which way is up, when he is through with them.
That is why I put almost no weight on what a defendant says on the stand, except in rare cases.