My understanding is that if the light turned red while she was in the intersection she is in violation. It doesn’t matter if the light was still amber when she entered the intersection. An amber light lasts long enough for one to clear the intersection if it comes on as one enters it.So if the photo shows a red light she must pay.But maybe it’s you who have to pay.
“An amber light lasts long enough for one to clear the intersection if it comes on as one enters it.”
This used to be true, but, unfortunately it’s not always the case, especially in areas with red light cameras. Studies have found that jurisdictions that implement red light cameras will usually also shorten the duration of yellow lights around the same time.
The signal timing should be set up that way but is not always correct. Some locals have changed the timing on the signals to be able to ticket more people. The length of the yellow should be timed and then compared to what the state law/Transportation Department say the minimum should be. If the timing is correct the then pay the fine if not you can fight it in court.