This can really be answered by others. This question is asked direcly to YOU. If you are unsure of the identification portion, it helps to google the terms, and based off what you looked up, you should be able to determine if your response fits in with any of these. Best of lock to you!
I think you should ask your sister a little more of what happened and why he did it. Then you should go find the boy and perhaps talk to his parents cause it's not right for him to do that.
