a fire chief murdered. his wife the only witness. this detective knew them both. she started telling me about a young man coming into their home, and shooting keith. her job now, solve this crime. clue number one was a doozy. she said ■çafter he shot keith, he turned to her and said i m sorry, ma am. i m sorry? a killer who apologized? that was just the start. a gun stashed in a dryer. a man s glove, but whose dna? a woman with a whole lot to reveal. she tossed her top to me. she just ripped it off? i was shocked. chief who spent his career helping those in trouble. hello and hello and welcome to dateline. keith bryan was a devoted fire chief who spent his ■çcareer helping those in trouble. then one night a gunshot shattered the life they had built and exposed scandalous secrets at the heart of a complicated crime. here s andrea canning with mystery in mustang. reporter: just about 20 miles of southwest downtown oklahoma city sits a town called mustang.