Is Stopping On The Crosswalk A Red Light Violation?

I received this email from a recent user and I do not know the answer:  

I have recently gone through an intersection, the light turned yellow and I applied the brakes really hard, but my car stopped over the designated stop line. I did not stop in the middle of the intersection, but the front wheels of my car passed the stop line. Is this a case in which the camera could have taken a photo under charges that I passed on red? My car stopped exactly on the pedestrian crosswalk of the intersection, but my car did not prevent the cars from crossing the intersection. Please email or post your response.