Criminal Record

My neice (11) was sexually assaulted by her step father and she is under my care as of now. She made a confession to me because she trust me more than her mother who is enabler. As of now wlang idea yung sister ko which is mother nya she was raped and I doubt that she will do something once na sinabi ko and based na din sa wish ng bata wag na muna kasuhan kasi bata pa yung mga kapatid nya and she doesnt want her mom to be alone to raise her siblings. We consulted a psychiatrist and we have confirmed that she is experiencing a trauma and anxiety from what happened cause aside from that may physical abuse din.

As an uncle what can I do? Anong records ang pwedeng ipagawa at i keep in case na ready na ang child mag face to press charges? My neice is asking cause she really wants this guy to be in jail but not right now.