She pretends to know things in hopes to scare people out to get a confession, she provides great theories, and reasons that those theories are possible, but no actual evidence yet that would get Avery out. She said she knows who changed the battery, and hinted at it being LE. If it was LE and she knew it was, and could prove it, she would have. If the warranty indeed links back to LE then Avery will 100% be exonerated because that proves LE tampered with the evidence and moved the vehicle of a murder victim... that’s pretty massive. She hinted at knowing this, but hasn’t provided any proof. She has done this same type of thing multiple times throughout her investigation. Acts like she knows something but doesn’t supply proof, then nothing comes of it