[charlandk]

This same thing was happening a few years not far from where I live. They would watch kids come home to get the hidden key so they know where it is. Then when everyone is gone they take the key, make a copy and return it before anyone gets home. They wait til people are gone and clean them out. No broken door jams or windows. If they take jewlery or small items the owners may not even know they are gone for a while making it harder to catch them.

Motion sensor video security. I can watch my house, garage and property inside and out using my iphone app or any computer at any time and it is recorded to a hard drive. It would take a very keen eye to find any of the video sensors.