Although very old the Hunt assassination is an example of an armored vehicle that was not properly armored. The scenario:
On February 15, 1984 Leamon Hunt was assassinated at the entrance of his home. His car was an armored Alfa Romeo, and was followed by a Fiat 128. Mr. Hunt’s home had
an electrically operated gate that had to be opened by remote control by the driver. As he was being driven home from work the driver stopped the car at the entrance to the home to open the electronic gate. At that point the terrorists jumped from the Fiat and repeatedly fired at close range into the rear windshield of Mr. Hunt’s armored car. Even though Mr. Hunts car was armored, the vehicle had a weak point at the junction of the roof and the rear window. Therefore some rounds found their way into the vehicle and struck Mr. Hunt in the head, killing him instantly. Where the roof meets the rear window did not have any armor. Whether the terrorists knew that and were firing at that spot or whether a lucky round found its way in makes no difference. The car was not armored properly, and Mr. Hunt is dead. If working in a high risk environment requires buying an armored vehicle then knowing how to buy one is important.
From the enclosed picture look at the numbers 21 and 23 on the rear window. You can see where the rounds penetrated.