Most of the time the parking lot driver has to yield to the driver entering from the street, If the driver was crossing closed traffic lanes in the parking lot then he may have some or all of the liability. Take photos of the location of the accident and the damage to BOTH cars if you can.

Do you have the address of the parking lot and a general location of the entrance/exit? I would like to look at the accident location in Google Earth...

Most of the time the parking lot driver has to yield to the driver entering from the street, If the driver was crossing closed traffic lanes in the parking lot then he may have some or all of the liability. Take photos of the location of the accident and the damage to BOTH cars if you can.

Do you have the address of the parking lot and a general location of the entrance/exit? I would like to look at the accident location in Google Earth to see what the "yellow line" is for. You may want to use some print outs from Google Earth to prove that the other driver was driving in an eratic manner,

Ben

Thebestchoie withyour sonis to tell that he was not driving and get away paying any money for insurance if he wishes to.
Same had hapened to me in a parking lot and the lady who was driving did not have a driving licence. She called her husband and when I asked her to pay the damage to the car then she told to the cop that her husband was driving and she got away without paying me any damage. This is the real world if you wish to survive....

Thebestchoie withyour sonis to tell that he was not driving and get away paying any money for insurance if he wishes to.
Same had hapened to me in a parking lot and the lady who was driving did not have a driving licence. She called her husband and when I asked her to pay the damage to the car then she told to the cop that her husband was driving and she got away without paying me any damage. This is the real world if you wish to survive.

In my opinon based on your description of what happened, from my diagram, it appears that the other driver (STOP sign not a yellow line) should have seen your son driving into the parking lot (if no TRAFFIC LIGHTS in front of him).

"yellow line" (solid) driver shouldn't pass
"yellow line" (breaks in the line) driver can pass if its clear ...

In my opinon based on your description of what happened, from my diagram, it appears that the other driver (STOP sign not a yellow line) should have seen your son driving into the parking lot (if no TRAFFIC LIGHTS in front of him).

"yellow line" (solid) driver shouldn't pass
"yellow line" (breaks in the line) driver can pass if its clear for passing

[no traffic lights at intersection]
Second opinon, from my diagram, son driving north into the parking lot (driver should have seen him) or driving north made a left turn into the parking lot, driver made not have seen your son's car if the driver pass around other cars that were in front of him. This result to an accident.

Who has the most impact to their car? Normally with my experience, if the car that was hit (dent) would be at "fault"

What you and son need to do, go back to the scene of the accident, take pictures and make sketches. Find out if there were any eye wintesses that may have seen the accident. If its a residentials neighborhood, you may want post a notice concerning that day. I say this because fourteen years ago, I experienced something similar. Driver claimed that I was at fault even though he a witness. My insurance was going to pay but I posted signs where the accident happen and 2 people came forward. Eventually, my insurance didn't pay the claim

I don't think you're going to like what you're about to read.... (and I'm sure I'm not going to get "the best answer award! " [read the "extended answer" area too] ...here goes).

There are two jurisdictions. First, "the parking lot" and second, "the street".

...

I don't think you're going to like what you're about to read.... (and I'm sure I'm not going to get "the best answer award! " [read the "extended answer" area too] ...here goes).

There are two jurisdictions. First, "the parking lot" and second, "the street".

Since you can't be two places at the same time, the accident either happened in the "private property" parking lot or the "publicly owned " street;

The "intersection" as I'm understanding, seems to be within the perimeter of "the privately owned" parking lot. ...and the accident occurred in this intersection, Correct?

If this is the case, then it doesn't matter what yellow ( or for that matter purple, blue or green) line was painted on the pavement as it's NOT a "LEGAL ROAD DEVICE" and therefore outside the jurisdiction of most State or city motor vehicle laws; It is essentially a "COURTESY MARKING", that's all;

The reason "the guy" is "going after your son" is simply because he has no alternative, there was no insurance company ( on your son's part) to underscore the accident, as far as he was concerned.

There were no tickets because the accident occurred ( luckily for your son) "off the street", where law enforcement officers have jurisdiction to write tickets; ( ..and guess who would have gotten a ticket for "no proof of insurance")?

In the end both your son and "the guy" will probably lose equally as most insurance companies generally wind up paying for their own clients in these situations.

If your son actually had insurance at the time of the collision ( but just didn't have the proof of it) then he's pretty much in the clear.

If,however, he didn't and "the guys" insurance company discovers this, "the guys" insurance company could bring "civil" litigation upon your son and it could turn ugly.

Good luck to you §