I was watching the movie ‘Lincoln Lawyer’ where the for the first time ever Matthew McConaughey didn’t take off his shirt (no wait, I think he did, twice, NVM).
THe movie follows McConaughey as he gets himself in a bit of a predicament realizing one of his defendants was wrongfully sent to prison while he simultaneously defends the culprit. BEfore it’s all said and done the final courtroom showdown takes place. There a number of ‘new’ pieces of evidence that seem out of place and irrelevant to any context of the case are introduced. I think that has something to do with collateral evidence, and in fact had the case been real, would’ve never been admitted.
I couldn’t find much on collateral evidence, but here’s a blog with a few cases from the US and Canada.