The RFE says pretty clearly what they want from you.
1.) Certified letter from the court
2.) Notarized statement describing:
- The events that lead to the arrest,
- The arresting agency,
- What charges were filed if any, the final disposition,
- A list of all charges,
- The location of the court
- Any punishments applied
You don't have to write them a bedtime story, you can just give the basic information as long as you answer the specific questions they are asking. Example: You were drunk and did xyz. Agency ABC responded and detained you. They determined not to file criminal charges but issued a civil citation for 123456. The County Civil Court of Blahblah, Blahville dismissed the case. No other punishments were imposed.
If USCIS wanted anything more from you, it would have said so on the RFE.