Basically they left their front door only locked by the Yale lock overnight.
They did not lock the front door by the deadlock because their son was out partying and they weren't sure if he had a full set of keys.
You probably have guessed what happened next - some opportunist burglar opened the Yale lock ( this is very, very easy to do if you know how - a child could do it ) and whilst they slept upstairs helped themselves to a couple of laptops, cameras, phones etc - and a handbag in the kitchen contaioning a purse... and car keys.
The happy burglar now had a car to get him home too! It was stolen and wasn't found for months...it contained a number of important work files..
Moral:
ALWAYS deadlock your front door at night
If you are in the garden or upstairs or watching TV at the front of the house - deadlock the door just in case! An opprtunist thief could wander in and silently steal anything...or worse!
