No, not at all.
I met 4 of them.
One shot a cop in a failed bank robbery, a lifer. Rocky sadly regretted it and made the best he could with the 30 or so years he had left.
Two were in for vehicular homicide (DUI). One had been a lifer but was was being paroled at 72. He looked a Sight. No horror movie could match it----no nose, caved-in skull from the accident, twisted lips, he needed much therapy just to Talk, again.
Another was on thorazine for his VH. He was a mellow fellow, to be released in 5 years. Bought ten chocolate Honey Buns a week-!
Another shot his parents at 16, was paroled at 75, He was costing the state too much in medical, so his life sentence commuted,
No murderer I met was violent to me. I suppose If I were stuck in San Quentin or in a 5 yard, I might have been exposed to some .