Sexual Abuse of nieces

[Rosey44]

Sorry I dont know where else to put this so I have put it here.
Hello I really need help and advise. My family is slowly falling apart at the moment. My 2 nieces ages 8 and 7 have disclosed the abuse just recently and police & SS was involved. Anyway mom who is divorced from dad claimed we were attempting to take them from her, so we felt even though it was investigated they really didn't believe us. The investigation was closed as they said, they did not have enough evidence. The paedophile (uncle) was never questioned or knows as mom doesn't believe its true.
Younger niece has now disclosed even more abuse to Gran (my mom) police has been informed. Niece has said she wont talk to police as she is scared of moms reaction. Meanwhile the paedophile uncle still has no idea, so he can carry on doing what he wants. We have been advised by Childline not to say anything & let this investigation conclude. The girls are visiting us, and my mom cannot sleep and keeps crying with the worry and stress. Dad is also the same. Can anyone advise what we can do?

OK, this seems a little confused.

The investigation was closed as they said, they did not have enough evidence.

Who are "they"?

We have been advised by Childline not to say anything & let this investigation conclude.

But you said the investigation had already been closed?

Rosey44 - paedophile uncle was never questioned Thats strange? I think he would be questioned. The children are questioned/examined by a team of experts, then they'd move on to the accused. At least that was what happened first with my dgc. Their df was arrested and jailed whilst a team gathered evidence.

Sorry sounds like I'm rambling.
The first time the girls said something we informed police etc... but SS said as there was no concrete evidence, the investigation was closed. He was NOT questioned and mom did not tell anyone or him. so he does not know he was investigated.
This time another revelation, police informed again. We rang Childline to ask for advise, should we tell this person and warn them off, they said no to let this investigation conclude. My nieces are so scared they will tell us things but NOT the police or SS. We don't know what to do? Younger niece has said she will say nothing to police.

Social services don't investigate abuse, the police do. Go back to the police. SS are there to protect kids when things happen, not to decide if there are criminal charges to be answered.

No way should you speak to the uncle (I assume the mother's brother?).

Nieces will be scared to speak to the police but the police have specially trained officers who will handle it. Also, you could have a chat and record the child talking to you?

The police will not wait for 'concrete evidence' before they investigate, the investigation is to find the evidence. Speak to the police again.