in april of 2011, detective john nickelson of transylvania county sheriff's department was at the scene when witnesses said richard o'shields fired five times. when he arrived, emergency workers already tried to save mathis. >> the condition was his upper clothing had been cut from him. there were ekg electrodes attached to his upper torso. and defibrillator paddles on his chest and side. and he was deceased. >> john: prosecutors say it was a simple revenge mission. mathis was charged with in involuntary manslaughter for the fell out of the truck and died. surveillance video of the general dollar location give details. and witnesses gave tearful testimony. day two of the trial focused more on the findings of law enforcement and a medical expert, including then county medical examiner dr. dale mesh who showed jurors a body diagram that pinpointed wounds in mathis' back. on monday, the defense will bring up expert testimony contending that the defendant had issues including ptsd and alcohol issues as well. the judge told jurors not to go >> larry: new at 6, a bryson city man that beat his