officer william "mike" grubbs american's ceo says grubbs' family "lost a husband and a father, and many of our colleagues lost a personal friend." airline pilot and aviation professor tanya gatlin says flight crews train for these rare worst-case scenarios. >> it is definitely an increased workload, and it's definitely a stressful situation. we're trained for it. we're prepared for it. along with that is the emotional stress of your friend, you know, and you're hoping they're okay. >> reporter: officials have not yet released a cause of death, and tonight, one passenger tells us, she had no idea how serious the situation was until that plane was on the ground. david? >> clayton sandell tonight. thanks, clayton. and when we come back here, the major headline tonight involving a famous serial killer. also tonight, that disturbing video. the young officer shot and killed. he pulled over a driver because of a taillight. that driver charged with murder tonight. so i liked when my doctor told me i may reach my blood sugar and a1c goals by activating what's within me