Not accusations, but absolute facts
None of this surprises me one bit. It is all about revenge and we are spoon fed in the movies and books the real and fictional accounts on that theme.
Here we have a man eaten up with anger over loss of a job. Could be called work place violence as it stems from his job loss.
He has had a few years to work out a plan that not only involves death but the mind torture of dozens of people and their family's. He is very cleaver so far, fear is his biggest weapon, fear of the unknown.
Betcha he spent many nights and days watching the hacking slashing movies to learn how to cause fear that is so horrid his victims can not eat or sleep, hard to function.
I think this has became a game to him now, Vincent Price would if alive recognise some of Dornors tactics came from a few of his horror movies.
He follows in the foot prints of Jack the Ripper and the Zodiac Killer by writing to the police and public taunting them. Upping the fear, darn the pain he is causing is worse then being shot and surviving.