Why is there suicide prevention in prison?

Great Question! I know, if they want to do the right thing and save us the tax payers some money, you know maybe feel guilty about what they did, why don't they. It is amazing how some people will take a life, without almost any thought, but sure fight very hard for theirs. I heard that about Charles Manson. He fought really hard to keep/stay alive. Hasn't he taken enough out of society as it is?? The sick M.F. O' and you know of course EVERYONE in prison is innocent. And I know what you mean about private citizens who are depressed or suicidal, the police or mental health centers will hardly provide any treatment except for medication.