this is newburgh in southwest indiana.ou can see the early days of the midwest in these historic buildings. open farmland everywhere. hometown, usa. a place for putting down roots. >> turn left onto county 45 west, then your destination will be on the left. >> reporter: and there it is. what i've been looking for. a gravel lot by a soccer field. a spot to play sports. to hang with friends. not a place for a young woman to die. it's jarring to think that when a life ends, so much begins. a family's grief. a community's shock. and in this case right here where i'm standing, a murder investigation. heather collins has always been proud of her three girls, especially her oldest daughter halee, who even at a young age was eager to lend a helping hand. >> there's, you know, so many pictures of her holding the baby sister, you know, and just taking care of them. yeah. she's always leading the way. >> reporter: my kids, they wanted to feed the bottle and, "can i change a diaper?" >> she was the best diaper changer ever. >> reporte