. >> reporter: lorenzo flores was at the gas station across the street when devin kelley began firingo this wood-frame church. >> how many shots? >> rounds. rounds, as much as he could put in there, i guess. it was nonstop. >> reporter: for the roughly 50 worshippers inside, it was the beginning of about four minutes of terror, as the gunman moved pew to pew. >> everybody get down, they're shooting at us. >> reporter: rosanne solis and her husband were wounded but played dead on the floor. the gunman yelled "everybody dies" and showed no mercy, not even to crying babies. >> it was so scary and that man was shooting. i mean he was shooting hard. >> reporter: on tuesday, the killer's dark past came into sharper focus. a sex assault investigation in 2013, an escape from a mental health facility, and a 2012 el paso police report that described him as a danger to himself and others. he had been sneaking firearms into holloman air force base where he was stationed and made death threats to his commanding officers. five months later, he was convicted of beating his then wife and step child.