They don't need to be rich or powerful - they just need to have something to lose or be believers in the 'it's for national security'. You don't need to ask the guards to fall asleep. You just need to ensure the doziest guards are put on the schedule.

Why do it in the prison?

A controlled environment where they have access to the cameras and all recording devices, not to mention all technology(access logs etc.) as well as no members of the public being around.

Out in public, you run a massive risk of some random noticing something/some camera inadvertently recording something.(or some random/some camera noticing/capturing something from the time leading up to it).

It's an avoidable mess.

Plus, a death in jail - people can rationalise it away - for the exact same reasons I listed above - 'oh, it's a controlled environment - $authorities control who goes in and out - they're not going let a random person walk around'

If I don't reply to this comment in 5 years, it is a sure sign that I have been targeted.

Last part is a joke.

Last part is a canary.

Joke.

Canary..