<human>: I went to a park where there is a sign that says dogs should be on a leash. Of course, once we got to the end of the trail and to the water for her to swim in, I took her off leash. She is well behaved and responds to my commands. 

Two police officers came up to me and ticketed me for having her off leash. They told me it's okay for her to be off leash while in the water, but not while on land. She was playing fetch in the water, so she would come back on to land to bring me the stick. Also, they saw me from a distance when I took her off the leash while we were still on the land, so that she could get in the water.

Anyway, I'm fighting it because (1) it's a stupid ticket, and (2) the police officers said it was okay for her to be off leash in the water. 

In addition she is my service dog in training and I have a service ID for her (though she has never been officially certified through a third-party program). She is just shy of two years and isn't quite focused enough for me to be comfortable calling her my official service dog yet. I'm wondering if it would be unwise for me to call her my service dog in the trial. And if you think it would be wise for me to call her my service dog, should I bring her with me to the trial?

I'm just wondering what I can do to prepare for my trial by judge. Does anybody have any experience with this kind of stuff?

Summarize the given text in a few sentences.
<bot>: Got ticketed for letting my dog swim in a park that requires dogs to be on leash. I am disputing the ticket and seeking others' experiences.