Not about the link your looking for. Call 911 and let the pros clear the house. It has been suggested on this forum before that it would be best if arriving home to find the door ajar calling 911 and let LE clear the house.
Which was the point of the article I'm looking for. I found another one but it was a scenario where the individual was in a conveinience store as an off duty cop and was searching out the BG. The bad guy won most of the time. It was intended to prove the point to call backup and hold position rather than seeking a threat in an unknown location.