@Genoshock @TomTangent
This is expecially true in small startups in
This is not today's business startup, he's looking for something to substitute for a military against demonic beings to boot. Beggars can't be choosers.
Would you want a criminal in your army?
Actually you probably would. The qualities that make a good law-abiding citizen are not the qualities that let you murder others easily. There are enough historical documents showing that criminals have often become war heroes.
They will be harder to discipline and end up causing fights.
You get fights in the military all the time, without having criminals - that's normal. Also harder to discipline is arguable - not everybody in prison is there due to sociopathic/psychopathic traits, thus his ability to follow orders is not non-existent.
They could steal supplies and weapons.
And do what? Die after the demonic beasts take over? The MC is paying them more than it's worth risking their position, if anything they'll be looking forward to clearing their crimes and earning extra money. Contrary to what you may believe, people are social animals and want to be accepted in their society (especially if they live in that town).
I am not saying to not give criminals a chance to redeem themselves but the Months of Demon is coming soon and they can't waste extra time dealing with conflicts from criminals.
The least of your problems are minor cases of misbehaviour when there are demonic beasts knocking at your door. You should be happy to get any and all men you can, as history has proven time and time again. But don't worry, I am sure the author would pull off a deus ex machina bs to resolve the situation.