I agree with you Jill, and would further say I think this info put out by Frenchbroad {an insider with an agenda as she has thrown out other things too} is a big fat Red Herring! JTF had brought this up mud Nov when she first started posting.
Alarm not connected, garage door not functioning properly - both simple things to fix if they were concerned for safety. Also JY was gone a lot during Sept and Oct, either on the road working or on a couple of trips.
If Michelle really was concerned she would have just taken care of these two simple things. I work for ADT, and any dealer will get you going on service for $99 activation fee and $34.99 a month! Almost nothing.