kaitlyn wheeler: my daughter is named lauren magnolia after lauren.mories of a vibrant woman fully alive. lauren giddings. 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.

kaitlyn wheeler: my daughter is named lauren magnolia after lauren. keith morrison (voiceover): memories of a vibrant woman fully alive. lauren giddings. 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. unidentifi