It would be naive not to think plenty of guards have an interest in securing convictions, CV, s don't fatten without results.Agree 110% (if that was possible) with @galway_blow_in .
I have been told same by many a guard, some of which I am related to.
Keep 'stum', until the court requires you to speak, for many a good reason, some of which will only come to light during the hearing itself.
If required to speak, answer the question and only that question in as few words as possible, do not 'volunteer' information.
A few tales have been recounted to me where people who believed 'they were 100% in the right' have unwittingly talked themselves into a conviction.
The DPP will do what they are going to do in most cases, no need to help out the interviewing guard by confirming anymore than your name and address.
Nobody ever got convicted in court for having pleaded the fifth