He appears to have a fierce sense of right and wrong, which feeds his obvious righteous indignation (being wrongly accused.) The stress incurred in these events that he listed, as well as others, along with whatever baggage he carried to the job each day (we all have some) combined with the loss of personal integrity that he feels was wrongly ripped from him,(and which has a very high value to him) results in his feeling (actually and personally) disenfranchised, with nothing else, as far as he is concerned, to lose. In this scenario, an 80 year old, 75 pound woman with a letter opener is very dangerous, much less this trained and motivated individual. The time frame tells me that this (these) actions have been dwelt upon for so long that what happens now is the release of the accumulated stress. Join me in praying for this person, and those implicated here. An intervention from God, in some form, seems the only likely resolution in this situation, in my view.
