Good neighbourhood or not, it's usually normal practice to lock
one's vehicle when it is parked or otherwise unattended. You can
never be certain that unsavoury people won't be cruising through
the area, looking for 'opportunities.'
Again, I'm sorry for your loss, but, to be totally honest, you do
bear a large portion of the responsibility by not locking the
vehicle. You might also have a hard time convincing your insurance
company to cover the losses.
Have you filed a police report?
