This is an older thread, but still a hot topic here in Los Angeles County.
Since I do sit as a judge pro tem in the Los Angeles County courts, I have had the benefit of having evidence presented in support of red light camera charges.
First, in Los Angeles County a prosecutor rarely prosecutes the case. Instead, the officer will simply state the evidence. (What ever happened to the "no question pending" objection.) Cross- examination is allowed, but seldom is effective cross-examination conducted. Of course, no defendant is required to testify. Most often they do.
A few months back, I had a camera violation come before me. A Sheriff appeared, but since he had not observed the violation was there only for the purpose of offering evidence relating to the technical aspects of the camera, and to offer the photograph which depicted a rather large man in a Chevy Suburban. The officer testified that the license plate on the vehicle came back to the man who had appeared in court to contest the citation.
In looking at the license plate in the photo, I could only make out one of the seven alpha-numeric characters. Although it was apparent that the Suburban was driven by a rather large man, his face was not visible in the photo. When I asked the officer to put all of his other papers face down on the counsel table and read the license plate from the photo, he admitted that he could not, but proceeded to explain that computer enhancement was used to determine the full license plate number which indeed was matched to a Suburban of the same vintage that appeared in the photo. The registered owner was issued a citation based upon the registration.
There was no cross examination.
I then asked the defendant if he had any witnesses (No.); or did he want to offer his own testimony. After thinking the second question over briefly, he replied, "No". The evidence phase of the case is over.
O.K., You make the call; Guilty or Not Guilty?
After making your decision, consider the following: If the person does not appear at the trial, except by counsel (a process that is allowed in California), what evidence can be used to prove (beyond a reasonable doubt) that the person named on the registration was the driver that committed the violation?