keith morrison (voiceover): its where she met lauren giddings. ashley muller: when we found out we both were from the north, we just instantly connected on that. keith morrison (voiceover): but then, why wouldnt she want to connect with lauren? she was bigger than life. ashley muller: she was infectious. i mean, you couldnt be around her for more than five minutes and not already be having a good time. keith morrison (voiceover): she was the adored eldest of three sisters. youngest, sarah. sarah giddings: we would always go on runs together. keith morrison (voiceover): kaitlyn in the middle. kaitlyn wheeler: she was more the book worm. she loved to read, academics. keith morrison (voiceover): lauren grew up in maryland, halfway between baltimore and dc, with her friend katie ohare. katie ohare: she was a riot. the things that would come out of her mouth sometimes didnt have a filter. keith morrison: why did she go south to go to school? katie ohare: she loved the south. she was a country girl at heart. and when she got there, she loved it. she did

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. unidentified woman: she came running towards my vehicle. there was blood dripping from her face.