was excessive and unreasonable, inappropriate, and inconsistent with generally accepted police practices. >> reporter: erin, a stark contrast when you compare the testimony from the use-of-force expert today to that from the other officers who testified saying they believe potter was justified in using deadly force. and it's something members of the jury noted. they were taking notes throughout his testimony, as well as the testimony from the other officers. yesterday's testimony was a bit dry. we saw document after document and information about taser use. but that dry testimony built up to what we heard today. we also learned members of the brooklyn center police department signed a waiver removing the manufacturers of the taser from any liability if something were to happen. erin. >> so, adrienne, the prosecution i know just called daunte wright's father as its final witness tonight. what was it like hearing from him?