Online
There are. Suicide a much bigger problem than you think it is.
https://afsp.org/about-suicide/suicide-statistics/
Note those numbers only count our country. It's a huge problem world-wide.
Supposedly, the death penalty is a deterrent, but it hasn't proven to be so. A psychopath doesn't care about dying, and people who commit crimes of passion are so caught up in their emotion, such a threat not only isn't a deterrent, but may even be something they desire.
I didn't say no one committed suicide, but if death was better than prison, than every lifer would off themself, and no one would fight against the death penalty in court, they'd welcome it over a life sentence. I'm not arguing for or against the death penalty, just against what I consider a misguided opinion that life, even in prison, is worse than death.