YES, this is unfolding so much like Sierra's case did.
You have the vehicle, and LE showing the picture, and asking for the public's help, and then going silent. Same kind of confusion for the public afterwards...and LE came out and said " No, we are not looking FOR this car anymore, just want to hear from anyone who has seen it around." We were all going HUH?
But the bottom line was the vehicle being seen around the crime scene was the thing that led them to the perp.
And the suspect is very similar in many ways. A previous criminal history, previous abduction attempts, and has a wife/girlfriend/steady relationship as well.
In addition, AGT's car was placed in the areas by surveillance video, too.