When Rizzoli and Korsak are chatting with Sam Langdon about Ainsley at the station, we see Korsak open his notebook and leaf to a fresh page then when the camera pans back to him, he takes the same notebook out from his jacket pocket.
The Coroner (Kent) says he found traces of a metal alloy in the wound. This is a common claim in police dramas which is completely wrong. The skin and even the skull is not hard enough nor rough enough to scrape metal from the surface of a metallic object.
Maura says that traces of methylene chloride was found in the residue left behind which is impossible since it is a volatile liquid that evaporates away completely. There is nothing in methylene chloride that does not evaporate away to leave any residue.