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I’m guessing that the driver of the pickup truck saw Del hit Boo with no headlights on. The impact of that crash knocked Boo’s car into the other lane where the pickup was approaching, causing the 2nd crash.
Boo was making a left turn across Del’s lane so she will be at fault. The cops won’t notice that Del’s headlights were not on or that he was drinking.
I’m guessing that the driver of the pickup truck saw Del hit Boo with no headlights on. The impact of that crash knocked Boo’s car into the other lane where the pickup was approaching, causing the 2nd crash.