[Seven_0]

As confirmed by a neighbor, the reason he shot right away is that they moved towards him right away. You want him to delay and increase the chances that he'd only get one before the other got him?

It doesn't take long to cover 15 feet and a shotgun is not the best weapon to get off two shots in a hurry.

[El Gato]

It doesn't take long to cover 15 feet and a shotgun is not the best weapon to get off two shots in a hurry.

Since one of the burglars was shot in the side, I would suppose that he started to turn at the time of the first shot, or possibly the second. One shot missed, maybe the second. There was a bit more time between the 2nd and 3rd than between the first and second.