The First 48 (2004)

S17E26 Knock at the Door & The Brave One

Title: A Fateful Visit & The Courageous Heart Plot: In Tulsa, Oklahoma, a man is tragically killed right in front of his fiancée when death unexpectedly arrives at their doorstep; a cherished individual loses his life while bravely shielding his friends from an assailant's fury.