slug cant tell crew is cannibalistic?

[Solraven]

so i have a slug crew member and a mind control device, but got no blue options for random encounter with drifting ship. i sent a boarding party and they ate my engineer.

[5thHorseman]

The ship's hull was laced with irradiated tritanium.
The Slug has a taboo against cannibalism and couldn't bring himself to report it.
The cannibals were totally sane looking to the Slug so he didn't suspect anything.
It was the Slug's off shift and he was sleeping.

I can probably come up with more if you need

[Sleeper Service]

The Slug actually has moral concerns about mind reading random people, especially when they are in such a pickle
The Slug was overwhelmed by the thoughts of hunger the cannibals where possessed by and could not anticipate their behaviour
The Slug simply made a fatal mistake there
The Slug was drunk on duty; serves it right then?
The Slug was seriously depressed with your mission and choose a very eccentric way of suicide
The Slug actually did not die, this whole event was cleverly executed ruse to extract a Rebel spy from your ship (my favorite)
The cannibals have a modified Mind Shield augments that works against Slugs only
The Slug is simply not very competent with this whole mind reading thing

[Matthew]

I support all of these explanations