If Shelby never talked, they got nothing on Aileen, right?
Stupid Shelby ruined it all. The evidence the cops got at that time, was circumstantial at best, they did not have anything definitive to convict Aileen, nothing! All they had was the old couples reported a red car that happened to be the same model as one of the victim's car (the license plate was later removed by Aileen). Nothing concrete.
The bottom line is, the cop knew Aileen did it, but they did not have enough evidence to convict her. UNTIL, *beep* Shelby ratted Aileen out and set her up.
What are your thoughts?