When you formulate your defense, formulate it from back to front. Don't try to put unrelated information forward and expect it to come out as a cogent defense. It is better to anticipate your defense and speak only to that issue.
For example, if your defense is going to be "I took this enforcement action based on the driver's attitude," get the IA detective to admit at the beginning of the interview that a driver's attitude is a reasonable factor in a discretion equation.
For example, ask something like: "Detective, if you stop a person who is truly sorry about committing the violation, is it reasonable to let that person go with a verbal warning?" In most cases the detective will agree with you that a truly contrite person could be let go with a verbal warning. The detective has also agreed that driver's attitude is a legitimate concern on a motor vehicle stop.
Now as you make your case you can show how it was the driver's negative attitude that precipitated the events being investigated. The driver was the instigator of the negative interaction by displaying such a bad attitude. This strategy can only work if you know what you ultimately want to prove and begin to lay the groundwork at the beginning of the interview.
When you think about the stop, think about all the violations, not just the primary violation. "The driver was speeding, but he also had a cracked windshield and wasn't wearing his seat belt." In this case if you only wrote one summons even though three violations were present, you come off like a focused professional who was not distracted from your mission by the driver with the bad attitude. This tactic is reinforced by your body of work.