other kids? you know, who was he playing with that afternoon? calls continued coming in to the police hotline, townspeople begging for reassurance. from a school principal we re meeting with our staff right now. the news said that our student had died last night, was possibly beaten to death by another youth. back at the crime scene, police were beginning to pick up clues that suggested another possibility that the killer had to be an adult. the police kind of descend en masse and one of the things they see is that in a back bedroom there s a window that apparently has been pushed outward. the screen is ajar. so whoever s in there has to leave. and there s only one way out. and that s the second-story window. there s no fire escape. you re kind of up off the ground. the developing theory was that when a cop knocked at the door that window became the killer s only exit. police surmised that only a fit adult, not a kid, could make such a dangerous leap. there s kind of
6-year-old female reporter: as firefighters arrived, bostic was crawling through smoke toward the sound of a screaming child. he scooped her up and jumped through a second-story window, saving her life. that s everybody. what s going through your mind as you re trying to bust that window out? may god be with us because we have to get the heck out of here reporter: first responders went to work on his fractured arm. we re going to stop the bleeding okay reporter: but through the pain only one thing was on his mind. please tell me that baby is okay reporter: she was thanks to nick who was airlifted to a hospital you did good, dude. if you don t put mr. bostic on the scene for another two minutes those children would be lost. reporter: heroic actions in the heat of the moment i was ready to lose my life that night reporter: the very definition of courage under fire steve paterson, nbc news thank goodness he was there. beginning tomorrow, americans experie