None of this helps if they come in your home and load it right on your machine because they were close to your family once.
http://spydevicecentral.com/vidnan_cams.htm
You could try this two ways........ Order it from a public computer and connect it to a time delay video and motion detector to start recording and catch the person in the act. I would check with law enforcement because to be able to be entered as evidence the video quality may have to be within certain parametres.
Or, a cheaper option would be to order all the equipment from your home computer, but phone up and cancel the order. The hacker won't know you've cancelled the order and won't want to risk coming back into your house and being recorded breaking and entering, hacking, etc.