There's a lot of "What ifs" in this case....I do believe the person getting the ticket got verbally upset...This is never a good thing...I'm guessing "Letter of the law" plays a lot more with a bad attitude.
Also, the less you talk, the better off you are, even if it's civil..."What you say can and will be held against you in a court of law".
I've mentioned this before, this should be a learning experience for all...If you hunt a lot, you're going to have encounters...Get used to it and try to be honest and respectful...They hold ALL the cards.
ps...If he in fact received the citation for just not having a deer tag in his immediate possession, then to me this case is very gray in a court of law (I also don't know what he actually said)...He could be hunting a number of other things that don't require a deer tag.