mode. >> reporter: lizz booked the next flight back to texas. >> i just knew i had to get there. >> reporter: had to get back. back to a new reality with a murdered father and a traumatized mother. grieving would have to take a number, while the daughter held everyone together. nothing made sense. coming up -- >> were you worried about your mother? that whoever this person was might come back? >> absolutely. she was traumatized. >> tips begin to trickle in. who could have done this? >> they're getting information right away about kind of a sketchy neighbor. >> that's right. just gettin' out of jail, who was suspicious. >> when "dateline" continues. ats is skincare from around the world better than olay? olay regenerist faced 131 premium products, from 12 countries, over 10 years. olay's hydration was unbeaten every time. olay, face anything.