Need some advise

[ssgharkness020147]

To make a long story short, I was at dinner a couple of weeks ago with a friend and got a call from my mom. She asked me if I was at their house (I dont live there). I told her no and asked why, she said that my 16 year old sister heard somebody downstairs, and caused the dogs to run upstairs (they have the most timid black lab alive, and a laberdoodle ). I ducked out on dinner and met her, my father, and the police as fast as I could get there.

Nothing was found, nothing was taken, nothing came of it. The police advised keeping the doors locked and using the security system more often. So life goes on and its over. Nope.

Monday morning my 21 year old sister thats home from school heard footsteps on the first floor at 9:30 AM. Duchess our black lab was so afraid of whatever or who it was downstairs that she was throwing her body against my sisters bedroom door to get in.

My sister went to my parents room, locked the door, called 911, and had the police on the way. This time we are pretty sure all the doors were locked. Again everything was there, some things were knocked over, but it appeared the puppy did it. Police advised to buy pepper spray, keep the security system on at all times, and have the locks changed. Which has all been done. They then went over to the neighbors house to check with their domestic help to see if they saw or knew anything, and follow it up with more patrols. There are 12 cops for 600 people, so there's no shortage of police.

What creeps me out are the intervals which this person came, my mom is at the gym three days a week at the same times. They usually go to dinner on X nights, at X time. But what really bugs me is the time the person is showing up, I dont know if they want to jack the house, or wait for her and or my dad to get home, or my sister for that matter. Predictability is part of the problem in my eyes.

What would you guys do to prevent this stuff in the future. I think a surveilence system would be a good measure, but the houses' walls are 2 feet thick poured concrete, so running wires and all that good stuff will be hard. Camera's at every door to take pics of whomever comes to the house is a must IMO. Guns... I'm all about guns for personal protection. Much to my dismay they are not, guns are out of the question. Any of the above would be a good step in my opinion, but the problem is there are all more or less a reactive solution.

I want them to purchase a warning dog. A dog that will display an aggressive stance on command, but not bite. My apathetic/complacent father would never own a "guard dog", rolling my fuking eyes on that one.

What would you guys do?