andrew dixon: i mean, it's all just wild. know pays silver that can be tracked. you're thinking, that's absurd. narrator: dixon and shepard stayed silent for months. then shepard had a change of heart. interviewer: dave shepard starts to fill in the blanks-- he does. --about what happened next. yes, he does. is that true? [indistinct] narrator: he started talking and wouldn't stop. [indistinct] i promise i'll be compliant and won't cause any problems. [indistinct] narrator: coming up-- woman: he wanted me to call the ex-girlfriend and lie to her, say that i was having sex with her boyfriend, as well, for money. narrator: --how a plot to get revenge turned deadly-- narrator: --when "dateline" continues. [music playing] [coughing] copd isn't pretty. i'm out of breath and often out of the picture. but this is my story. and with once-daily trelegy, it can still be beautiful. because with 3 medicines in 1 inhaler, trelegy keeps my airways open for a full 24 hours and prevents future flare-ups. trelegy also improves lung function,