Security System?

  I was outside and Nellie told me this:
            Last Monday night, at 10:30 p.m. she noticed a white SUV pull over opposite out driveway, heading toward Johnsonville.    A figure, may have been a man, got out and walked near my car and to the side of our house, the side next to hers. Nellie said the SUV left, leaving the "prowler" behind. Nellie called 2 people who were with her, and all 3 watched. Nellie went inside and got her flashlight but the person evidently left, but not in the vehicle, from here anyway.   Nellie's dog was uneasy, and the next day it threw up, and she found a piece of fabric near it, which was not theirs. Today the dog is sick, and she wonders...
    I believe her.  The only recent encounter was when I had the brush removed last month.  They were local, from Johnsonville. The wife remembered me from my teaching days.The son was 30 and was working with them.  He seemed ok.
    It's no secret  that Dave is helpless. The ramp is a giveaway as well as the transport van, and the fact there is only 1 car in the driveway.
  She said my car was there and my living room lights were on.
***I haven't even mentioned it to Dad. He's so helpless he couldn't even run, and doesn't need anything else to worry about.  If nothing bad happens, that is.