Cop question

yeah it was a crime but me and some friends sat outside his hous4e across the street for hours till he came home then called the detective that was working on the case and when we let him know he said he was on his way. Then i got a call back saying CPD wont let them come over without an escort and they were waiting at the cheektowaga station and basically telling me stay where i was there on there way and if he comes out dont approach him under and circumstances, cuz i wont lie if i saw the kid that just stabbed my little brother in the head 3 times with a hunting knife allmost going through his skull and just missing his eye, thank god he wore glasses, i wouldnt have stayed where i was.