Lost in Time misrepresents how death penalties, criminal deterrence, human nature, society, the justice system, and the Supreme Court work all at once. I’m not sure if this is trying to be propaganda for capital punishment or just a careless misstep in the pursuit of context for the story.
The book constantly states the prisoners the “worst of humanity” despite also being a story about the judgement of innocent man and never once mentions that others our heroes blink out of existence maybe just maybe might also have been unjustly accused.
(Also, time travel stories are hard. So many examples of “I can’t do anything different without destroying the universe” comments while constantly making a bunch of huge and small changes.)