Ask the little girl how it happened and if she hesitates to answer ask the dad to step outside and talk to her and see if she is will talk to you personally and privately and if she doesn’t say anything bad happened then you can’t force her to say anything so just give her x-rays and just go on about your day and if she was to come in again for something similar then you could possibly get another nurse to help find out why she keeps coming in with “sprained” bones