Phil Hartman's relative speaks out 20 years after his death

Greg Omdahl, the brother of Hartman's wife, Brynn Hartman, spoke to ABC News for the first time about the couple's relationship.
4:45 | 09/18/19

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Transcript for Phil Hartman's relative speaks out 20 years after his death
exclusive about Phil Hartman. More than 0 years after his murder his brother-in-law is breaking his silence and sharing home videos for the first time. Chris Connelly is in Los Angeles with the story. Good morning, Chris. Reporter: Good morning, George. You know what, "Snl" and on talk shows, "The simpsons," Phil Hartman could always make people laugh then on a day in may of 1998 that laughter transformed into shocked size and the question, why? Two decades later on a two-hour ABC news event airing tomorrow, there are some answers at last. He made millions laugh as president Clinton on "Saturday night live." Jim, let me tell you something, there's going to be a whole bunch of things we don't tell Mrs. Clinton. Reporter: And as a self-centered radio host on "Newsradio." It's time for -- the real deal with Phil Mcneil I'm your host. Reporter: Phil Hartman at the top of his game when in 1998 at the age of 49 he was shot and killed by his wife, Brynn Hartman who then killed herself. After I heard Brynn had shot Phil and then heard Brynn had shot herself I think everyone was in shock and the family and cannot imagine why she would do Reporter: Now for the first time in a new ABC news special, details of the couple's relationship from Greg Omdahl, Brynn Hartman's brother. I would say Brynn confided in me quite a bit. I don't -- she was upset with Phil on one, maybe two occasions where he would be doing a part, "The simpsons" or "Newsradio" and mentioned to Brynn maybe I can get you a part and when he had come home, she'd say, well, did you talk to them about getting me a part and he'd say, oh, I forgot and she would be upset about that. Reporter: An inside look at the Hartman family before tragedy struck. In home videos. Hello. By all external appearances they looked happy but there are cracks in the armor. What makes me the happiest? Without question it's being a father. Reporter: The video of Phil playing Simon says with the two kids. Simon says run in a circle. Simon says stop. Simon says hands in the air. Hands at your sides. They loved him very much. It showed in the videos. You love me we're a happy family Reporter: But the marriage was troubled. The couple fighting often over Phil's busy work schedule and Brynn's substance abuse issues until the early morning hours of may 28th when Brynn returned home from a night of drinking and shot her husband. Just hours later as police arrive on the scene, Brynn could wake her own life as well. So selfish, how she could take him away from everybody. I've lost a sister that was such a wonderful person and a brother-in-law who was wonderful and it was very hard. It was -- it was like getting punched in the gut because I knew my sister would never murder anyone. It was such a hard thing to face. Reporter: The couple's two young children 9 and 6 years old at the time were home at the time of the shootings. The children, a 9-year-old boy and 6-year-old girl have been taken into protective custody. Reporter: They would be raised by Brynn's sister after their parents' deaths. Now more than 20 years later, Greg Omdahl says they are thriving. Bergen is doing great. Bergen. She's married now and her and her husband have started a business that's doing real well. Hey, bergie, what do you want to say to yourself ten years from now? She's a beautiful gal and has a handsome husband and she's living a normal happy life. Sean is doing well. He got a degree in art and he's pursuing his dream of being an artist and musician. Hi. I believe Brynn and Phil would be very proud of how Sean and birgen have grown up. Reporter: For two decades his friend, fans and family have struggled to make sense of that morning and what led to those tragic deaths. And you'll hear more powerful personal recollections and see more of those glims inside their lives tomorrow night. Guys. Thank you, Chris. That's right, "The last days of Phil Hartman" airs tomorrow night at 9:00 eastern, 8:00 central right here on ABC. And coming up here, sorry.

This transcript has been automatically generated and may not be 100% accurate.

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