how did she manage to open it? >> reporter: key question and something we've been trying to answer all day, find out the operator of that bus. it was a church bus, we have not been able to find the facility or the place that kept that bus so that is a key question, to find out whether or not that bus was possibly fitted with some kind of special devices or if it wasn't to be able to prevent that door from swinging open. but he told me that that bus driver did eventually come back to the scene several minutes later. now the question is how was this 4-year-old little girl able to open that door as you see it swing open. eventually she sustained some serious injuries. but she'll recover. >> thankfully she's okay. there's a happy ending. thank you. you're in the "cnn newsroom." thanks for spending part of your weekend with us. i'm anna cabrera.