Lacking Commoon Sense
The thief first broke into a car and stole the satnav. Then thought it wise to journey to the victims home and then steal a car parked on the drive just to dump it somewhere - perhaps as an inconvienence?
That shouts oppurtunistic stupidity! Even if the assumption was that the house was empty and then the car being an easy steal... the house - full of valuables considering the victim has 2 cars, one worth £20k - is left untouched.
How did the police know it was the same guy? Did he leave the satnav in the drivers seat when he dumped the Saab or was it an assumption? What if the guy was just really unlucky?
A simple PIN on the device stops this story coming to light, ever - even the urban myth side of it - and Mr. Walsh getting his panties in a twist.