Moments after the crash, a passerby who came upon the flipped car called 911 and said the driver had already left the scene. Abby told cops she walked home because she didn't have her cell phone and wanted to call a tow truck.
Unclear why she didn't flag down a motorist or knock on the door of the home where she flipped.
Despite the severity of the crash and the curious fact she left the scene -- cops say they had no reason to believe Abby was impaired and did not administer a DUI test of any kind.
But now with Abby admitting her life was out of control with booze and prescription drugs -- we had to ask her straight up ... were you intoxicated on the night of the crash?
Abby has never spoken about the crash to media ... and it's clear, she doesn't want to start now.