IMO, Waters was furious after watching AM blustering and snotting all over himself, when these emotion had not been witnessed by LE, over the murders of his wife and son, up until today, and IMO, AM was putting on a show for the jury.
All of us that follow true crime know that it is never a good idea for a defendant to take the stand in their own defense. This is trial, and the prosecution's case should be what is front and center as to proof, but when the defendant takes the stand, it becomes about the witness's credibility in the eyes of the jury. When AM decided to take the stand, AM was skillfully aware that this decision would change the focus of the jury to him, and his ability to get them to believe what he is saying versus the evidence/State's case. The burden of proof was shifted.
Usually, jurors are lay people unfamiliar with the legal process and the various preparations by the different parties, evidence exclusions, pre-trial motions and arguments, etc....
I completely understand Waters anger. If AM was willing to talk and admit to being at the kennels, why hadn't he already done so?
Also, JMO, but AM's lawyer jockeying was shown today. AM showed he is highly competent in understanding the system, working the system, and until 2021, AM was able to live a very extravagant life.
JMO. moo