User: Given that preserving human brains for more than a century is fairly uncommon, what do you think was the motivation for preserving Guiteau's brain?
Assistant: One reason for preserving the brain may have been to study structural abnormalities that could have explained Guiteau's violent behavior. Alternatively, because Guiteau was well-known and infamous, his brain may have been preserved for use as a memento or as a warning to discourage presidential assassinations in the future.