ashley muller: always. keith morrison (voiceover): and mercer law school, perched on its hillside in one of macons sweet spots, seemed just right for her. katie ohare: she was a fan of nancy grace. nancy grace graduated from there. keith morrison: oh, well. keith morrison (voiceover): lauren found a great apartment, right across the street from the law school. it was full of aspiring lawyers. her next-door neighbor was a classmate. even the maintenance man was a student. and soon she was everywhere. running in the park. active in her church. eventually president of her law schools federalist society. she was hard to miss. ashley muller: she showed up in her pink outfit. keith morrison: always pink? ashley muller: always pink, or even seersucker. keith morrison (voiceover): and always with her dog butterbean. ashley muller: fluffy, blonde haired, just like she was. keith morrison: and she carried it around all the time? ashley muller: always. she basically was elle woods in legally blonde, so we always, kind

ashley muller: i would tell her how much i miss her and that i love her, and that shes the reason why i am who i am today. i would tell her thank you. craig melvin: that's all for this edition of dateline. i'm craig melvin. thank you for watching. . i'm craig melvin. and i'm natalie morales. and this is "dateline." i arrived at the office. i could see that something was really, really wrong. i called somebody that steve worked with. he said, steves been shot. and i said, did he survive? and he said, no. craig melvin: steve pitt was unforgettable. natalie collins: i think hes one of a kind. he just completely broke the mold. (photo of steve pitt; exterior of office building) craig melvin: he was the first to die that week. hunted down by a man with a gun and a grudge. natalie collins: i felt that when this shooter crossed steve off, that he was moving down a list. craig melvin: a long list. unidentified woman: she came running towards my vehicle. there was blood dripping from her face. craig melvin: six murders. scott wightman: my guts just absolutely dropped. craig melvin: in four day