5 PS days are more than 5 real life days if i\'m right.
50 minutes an hour, 32 hours day and 200+ days a year was it right?
Anyway, they should go to jail for less than an hour (a hour is for killing more than 5 people (50 minutes). 30 minutes for killing 1 person, 15 minutes for attacking someone and 10 minutes for stealing IMO.
The fee they will need to pay to get out is like 1 Tria for every minute. So if you have been jailed for 30 minutes you can pay 30 Tria to get out of it.
The stolen item will also be returned if you get caught.
you should be able to get caught by NPC guards when someone calls them (by shouting \"guards\" or something like in UO, or when a real online player catches him with a jailing skill or something (he should be in a \"Yliakum guards\" guild or something.