2371812:OK the owner of this comment is a liar i was at the tournament am a level one judge and what the HJ did was justified. Tim is just pumping you full of crap i am sorry but in my opinion for not have a side and extra in the final round because he 'lost it' was grounds to DQ him right then. But whatever.
What you've stated is what we commonly refer to as "Reverse Engineering" By that we mean, assigning a penalty first before determining the infraction. Please do not do this. As a judge the correct proceedure should be first to determine if there is indeed an infraction and if so what that infraction is. Once the situation / scenario is fixed (if it can be fixed) then the correct penalty for that infraction should be assigned according to the UD Penalty Guidelines. Those same guidelines would help to understand what infraction has been commited if you'd please read them carefully.
I'm afraid your "Opinion" should have no bearing on what penalty should be applied. The infraction should be what determines the penalty. If during a match a player realized they had lost a side deck or extra deck, that would equate to Deck Error-Illegal Deck Sheet (Game Loss) The player would then be allowed to replace the lost items. If the player realized they were missing their Side Deck or Extra Deck before the match began, they should be allowed to replace it without penalty before the match begins so long as they do not delay the tournament greatly by doing so.