Trivia: In the diner when you see the real Erin Brockovich (the waitress), you can also see the real Ed Masry. He is sitting directly behind Julia Roberts and her baby. Another side note, look at the real Erin Brockovich's name-badge, it says Julia. (00:10:05)
Trivia: Julia Roberts became the first actress to receive a $20 million salary for her work on the film.
Answer: They would have had to prove he ran the red light, which would require video or witnesses. It seems like Erin had no witnesses backing up her version of the story, so they wouldn't have had anyone to say he went through the red light either.