Sorry if this seems long and a little scattered...

My wife (mid 30's) for the past 5-6 years is having problems, she says that she is "hearing" people talking about her....

A little history

We moved into our new house about 3 years ago. After living in a few apartments which we also had similar problems (hearing voices). It seemed to have started in the apartment before that one the tenants that lived above her followed her from room-to-room.

About two years ago my wife started telling me that she is hearing voices (again) in the bathroom that are basically mocking her. Telling her she's fat and/or ugly (which she is neither). The house was build by a developer who lives and the end of our cul-de-sac (he also built the other 5 houses around us). She believes (knows) that through the house is bug and being video taped (put in by the developer). We haven't been intimate in a few years cause of the fears that we will be recorded (and also she is believing that she is fat and ugly and i don't want her). I have asked her to take a tape recorded with her to 'tape' these voices and she won't (cause she says the tape recorder won't record it). I don't hear anything when she say the voices are talking. I cannot discuss any personal things (cause they will hear it), go on any vacations together or leave the house for any extend period of time fearing they will come into the house and look through our stuff, plant more (or remove) listening or taping devices. At times while in stores she thinks people are talking about her or looking at her as if they know her. When we do leave the house we cannot talk of were we are going cause my wife believes the car was bugged (planted when the car gets repaired), also she keeps a watch to see if we are being followed. Its gotten to the point that she believes all the houses that are around us are in on this and watching/listing to us. I asked her to find a service that can scan the house for these devices, but she gives me the excuse that they will be paid off by the builder to report they find nothing. She gets upset with me cause she says I don't believe her, I do believe her. But for me to get the authorities involved I need proof. I've comb through attic looking for wires that should be their, but found nothing. I also suggested that they go and talk to someone about this and she got very angry about it. She now want to move to a new house, but my fear is this problem will only follow us. The only trauma she has had (that I know of) is that she was raped by one of her old boyfriends (early 20's). I love her dearly and this is putting such a strain on our relationship. What can I do?