Car Alarms: Dads Car Alarm, fight fire with fire, citroen xantia

Question
Ok my dads car alarm keeps going off around 12am and 2am, recently around 1am. we have a next door neighbour that my family and that family don't get along. Me and his son are a far bit in to gadgets. I think my dads car alarm is on an open circuit. I cant tell but I saw his dad look out the window and it would go off. I have done shed loads of research on this but cant find what software or the thing he could be using (if it is him). I also think he might have another gadget that does it I think. I have 2 ideas on what to do. I would either like to block the circuit or fight fire with fire. My dads car is a Citroen Xantia. any idea if my facts are right or if I am judging my neighbour wrong

Answer
Hello.
I am away from my desk for the next couple of days.
Please restate this inquiry at my 12 volt
installers Forum at www.INSTALLSUPPORT.com .

I am certain that this will be solved
for you there within a couple of hours.
Good luck.

ALARMTEK