In this instance a lollipop stick might have been as appropriate a tool as any considering it is on record that that the patio door was unlocked.
In my opinion the open window and raised shutter indicates that someone other than the named persons we know of was there that night. Which is why it is so extraordinary that the police began leaking about a badly told story almost before the CSI officers had time to replenish their supply of fingerprint powder let alone for the lab to produce a forensic report of their findings.
Yes, Brietta, agreed. I was pointing out that our intruder would use the path of least resistance, so naturally would check for unlocked doors, all doors, first, then consider an alternative route of entry. The patio doors being the most vulnerable due to their secluded outlook and relative ease of defeating. The shuttered window would probably be option 3 of 3 for any self-respecting burglar / child snatcher. Conversely, would probably option 1 as a red herring, if one were ever required and if said burglar / child snatcher deemed it necessary.