INTRUDERS WHO HAVE BEEN SUCCESSFUL in defeating and evading reed switch contacts with magnets leave no forensic evidence. While one could look to police reports which note a break-in occurred and the “alarm didn’t work” as an indication of magnetic defeat crime, there is no organized means to gather this data from police departments. But this we do know: (1) High security facilities demand magnetic defeat resistant sensors. (2) With the advent of the internet and the free flow of information, there are no more secrets. (3) And, it’s easy to do – so why would you want to leave yourself vulnerable?  >>