Legal Question in Criminal Law in North Dakota

Re: may have left 1/4 oz. marijuana and pipe in hotel room.

What will or won't happen largely depends upon the hotel. Maybe a housekeeper or a subsequent guest found these items and decided to keep them. On the other hand, maybe the hotel called the police. There are many other possibilities, and your guess about what happened is as good as mine.

Simple possession of a small amount of marijuana and a pipe is a minor offense and, unless you are already a suspect in another case or could potentially be pressured into serving as a witness, I don't think the local police will put substantial resources into this matter. Yes, you could theoretically be put under surveillance and search warrants could be issued, but these developments seem unlikely.

There is nothing you can do now except wait and see if the police contact you. If they do, be sure not to admit doing anything (if you don't incriminate yourself there may be no way to prove these items were yours rather than a prior guest's -- or the housekeeper's) and then get a lawyer right away.