I guess it all depends on the state you are submitting the application but seems to me like all you need is certified dispositions from that case to show the outcome of it. Any evidence of completion from the court and you shouldnt have any problems. Again not legal advise but i myself had several arrest 6 to be exact all for criminal offenses and it wasnt a problem during my N-400. It was an extensive interview and mostly center on my criminal history during my early 20s but i walked out a citizen. I had to show dispositions for all cases to show what i pled guilty to, cases that were dismissed, proof of completion of my probation for one of the cases and proof of completion of an anger management course i was mandated to take. Just be truthful because they have everything they need but its up to your wife to do the leg work to find all the documents they already have lol.