My point is that it has been done and had disastrous outcomes. Surely attorneys learn from the past mistakes made in high profile case.
I think it depends on how ludicrous of a theory the defense paints. There is always a gray area, but I would be willing to bet that many murder trials involve the defense introducing an alternate theory in order to place reasonable doubt in a juror’s mind. I was a juror on a murder 1 trial and I specifically remember the defense presenting such theory. I don’t remember the defense’s alternate theory to be necessarily ludicrous, just highly implausible. However, it just takes 1 juror to convince.....