Wife got rear-ended. Vehicle that struck her was rear-ended by hit-and-runner

Location: Phoenix, AZ
Dashcam and photos: https://imgur.com/a/bge3nSs

This occurred during rush hour on Highway 101. My wife’s vehicle (Red Pathfinder) was struck by another car (Silver Kia). She panicked and did not pull over. Instead, she drove home, which is about 20 minutes away.

I drove back to where the accident happened. This was about 40 minutes after the accident. I found the other vehicle parked on the side of the freeway (Silver Kia), with the driver speaking to a police officer and giving a statement.

I approached them and explained that my wife had been driving the vehicle involved in the incident. The officer offered to file a separate report that I can use for insurance purposes.

I briefly spoke with the other driver. He stated that his vehicle had been rear-ended and that the impact pushed him into my wife’s car. He said he pulled over, called the police, and provided his statement.

I took photos of his vehicle, both front and rear. The front damage aligns with where his car made contact with my wife’s hitch receiver. However, there is no visible damage to the rear of his vehicle. There are no dents or scratches, which raises some uncertainty about his account. Is he lying?

At the same time, it is unclear why he would stop and contact the police if no other vehicle had been involved. He claims that a black Infiniti struck his car from behind and then fled the scene. However, I reviewed the full dashcam footage, and there is no visible black Infiniti or any similarly colored vehicle passing within view at or around the time of the incident.

Should I make a claim against his insurance?