If the ransom note is a hoax from someone not connected to the kidnapping at all, and, as Levin believes, from someone from Tucson, it could be from someone who is somehow loosely connected to the family/their associates and has heard gossip about what was found in the house. I'm personally leaning towards it being an opportunistic hoax, and I was assuming that details about the watch and the broken floodlight were gleaned from media and videos of the outside of the house. But if the description of the watch location was more specific than what has been talked about publicly (on the charger) or what could be somewhat safely assumed (by the bed, bedside table, or generally in the bedroom), then maybe there's some inside info involved.