So why would her father advise her to do that? (Rag in tailpipe.)
According to the O2 documentary, her car had numerous mechanical issues, one of which was excess smoke coming out of her exhaust. Fred suggested that if she had to get by police, she could stick a rag in the tailpipe, so police wouldn't see the smoke coming out. It wasn't practical advice, which Fred even admitted, but enough to at least prevent Maura from being pulled over.This. I know that a rag in the tailpipe can lead to increased CO. I was asking why her father advised her to do it if she was concerned about being pulled over.
But if they had this information back then why are they just searching the area now 18 years later?