I think the shooters have every opportunity to not kill 49 people by getting help.

These events aren't random, they are often planned ahead of time.

If anyone is planning a massacre, mentally ill or not, they are mentally aware of what they are doing.

Lastly, 395 (approx) people killed by mass shooters from 2010-2017 with no data found for 2018 or 2019. Those lives mattered, so very important they were.

In short, mass shooters aren't imbeciles, they know what they are doing and know it is wrong but chose to do it anyway.

In summary, the shooter would forfeit their right to humane treatment and face severe torture.

I have no care for the wellbeing of a shooter, just the innocent people, who were really important, that were killed for doing nothing wrong other than being in the wrong place at the wrong time.

Fuck shooters, everyone needs to know and see how severe the torture is and would be.