[LoneGOPinCT]

That's what I don't get. If the security system had been breached, why didn't half the neighborhood hear the siren? How could people asleep in the house not hear it?

I don't know all of the details, but I suppose it could be a silent system. The thing with silent systems, though, is that once they are tripped the alarm company (ADT, Wells Fargo, etc.) silmultaneously calls the police or fire department (depending on the trigger) and the residence to confirm any problems. I'm unaware of any silent systems that do not have a emergency response aspect to it. I personally don't have one but I know them fairly well between my Grandfather's house and the one we have at work.

[scholar]

I'm unaware of any silent systems that do not have a emergency response aspect to it.

I have been wondering about this all along--what kind of a security system has nothing but a flashing light that could go unnoticed or simply ignored?