Dad is approaching 90 years old and is fully aware with no memory issues, takes care of all his own bills, etc, and insists on independence. I thought he was driving well, but his driving at night was awful recently. Last year I rode with him on errands and an appointment so I could see how he was doing, and his driving and parking was spot on. But I accepted a short ride before dawn one morning recently, and it was scary. He does not drive at night at all otherwise. Now I'm scared about his daytime driving but I'm not with him generally so I don't know. I'm scared he might hurt someone or himself. We're in California. Does DMV deal with this at all, and can I report him and be anonymous? Should I speak to our local police about this? I don't want him to find out it was me. He insists he's doing well and doesn't need help. My therapist tells me this is not my responsibility, but I feel like since I knew about the dark-time incident, it kind of IS?