> (unless that person is in government custody)

Someone please correct me, but do they ever much bother to protect those in custody?

Their main method of "Protecting" people in custody has been deemed a form of torture called Solitary Confinement.

They certainly seem to be willing to spend a lot to keep Luigi Mangione safe.

That's tangential... they can be held liable if they fail to protect somebody that is in custody. They generally cannot be held liable for failure to protect a member of the public.

Generally speaking, yes. I have worked with the corrections side of law enforcement in the US and don't internationally for quite a few years at this point. The correction side is a different beast than the police side in many ways, so I definitely want to meet clear that my personal experience is limited in scope to that. However, generally speaking I have seen that the majority of corrections staff take protection very seriously. There are individual officers that can be scum, and ideally they should be bounced out of there. But realistically, it's a human problem. I've known plenty of software engineers that were cavalier with people's personal information in ways I think can be just as damaging. On the whole though, the majority of software engineers I know take protecting that information quite seriously.