According to the CHP – Contra Costa Facebook page, “This evening at about 6:15 pm, one of our CHP Officers was involved in a traffic collision at SR-4 eastbound and Port Chicago Highway (in Concord). He suffered major injuries, non-life threatening, and was transported to a local hospital. The scene is still active for the investigation. We have no further details at this time, but we will advise when we do. Thank you.”
Further reports on NBC Bay Area TV Channel 3 News and ABC7 News he was a motorcycle officer, and an SUV flipped an landed on the officer including a broken leg. It set off a chain reaction including at least eight cars and three separate crashes. It backed up traffic on Highway 4 for miles.