What the defense should do is get a can cut that way, and put a very thin plasic bag of nails inside and give it to the jury to pass around, and explain the ramification.
Better to have a blue practice grenade -- but that would clear the whole courthouse and send both Nazario and his lawyer up for life!
Now that you have an approximation of the tool, where are you going to get a witness with fresh, raw, lean hamburger covering their face, throat, chest, arm stumps, etc.? Did I mention that the cheeks are sliced back to the rear of the jawbone?
Like I said, unless you’ve been there .......