I has dealings at my former employment with a coworker that was manic and bipolar...
He would be fine for a few weeks on his med's,.. then go off them because he was fine...
Then,.. he would go off the top and get violent... (he was also 6'2" and over 350lbs)... he used to whisper to me that he was bringing his "9"mm tomorrow...
My boss (female) eventually quit ,... I stuck it out for 2 years, but developed PTSD and left... my girlfriend quit one week later...
The guy didn't get fired,...(he had NAACP, and Disability lawyers, plus his ex-MOL was VP)...
He did get fired 3 weeks after I left,... for sexual harassment...
Funny,.. sexual harassment will get you fired, but murder treats don't...
...
I did secretly pack a little 22,... and had a very "strategic" layout of chairs around my desk and a few heavy items on it...
Very stressful...but I was defensive of my ladies in the office... so I couldn't leave them alone to deal with him.
Anyway,... I don't know the solution,... but it's so much more common here, than in other countries... there must be some mix of measures that would make this less common...
Peace,
Serow