Failure To Stop For Emergency Vehicle
My mom received a ticket under OHTA 159(1). She was turning left at an intersection. The light was green and there were no cars in front of her. She entered the intersection and waited for incoming traffic to clear so that she could complete the turn. As she waited, a fire truck with its sirens on was driving from the street onto which she was turning (perpendicular). He honked at her (presumably for her to get out of the way) and she proceeded to make the turn (and clear the intersection). At the same time, the light changed to amber.
Soon after, a police car pulled her over and asked her if she knew why she was being stopped. She really had no idea. My mom is a very careful driver and has been driving for 30 years without any accidents or tickets. The officer told her that she should not have made the turn, and that the fire truck could have passed her. She also said that she could arrest her for this offence, but will do her a favor and not do so.
We've asked for a trial (date is set) and requested disclosure. We received handwritten notes and nothing else. We had asked for dashboard cam footage (from both the police cruiser and fire truck) but this wasn't provided (it isn't clear whether this is because there is no footage or because they don't want to use it and therefore aren't disclosing). In the notes, the officers states that my mom's car was behind the white line (and NOT in the middle of the intersection); this is not true, because any driver who is turning left enters the intersection rather than waiting behind the white line when the light is green. The officer also wrote that my mom said she "panicked", which is also not true. This isn't the first time my mom had to clear the path for an emergency vehicle and knew exactly what to do.
According to the OHTA, one needs to pull over to the right to allow an emergency vehicle, except when in an intersection, at which time the driver should clear it and then pull over.
I was wondering if anyone has any advice what to do with this ticket. It's not the cost or the demerit points, but the fact that my mom didn't do anything wrong. I would really appreciate any comments or suggestions.