My mums abusive ex lives in same place

[HelpWhatToDo2708]

Name changed as outing

30 years ago, when I was a teen, my mum was in an abusive relationship. It was mentally and physically abusive. He was actually jailed for 2 years. My mum moved us 300 miles away to start a new life.
15 years ago my mums parents became unwell so we moved back to our home town. Mum was very nervous but had heard on the grape vine that her abuser had moved away.

My mum is now in her 70s and has been unwell. She agreed to move from her 2 bed house to a small flat in an assisted living place. She has carers 3 times a day and there is always somebody there if she needs help.
It's been an expensive move as new furniture was needed, carpets etc.

2 weeks on and my mum rang me in tears. She's gone to the on site cafe for lunch and had the shock of her life..her abuser is sat having lunch on the next table. She said she made her excuses to leave immediately and isn't sure if he has seen her or not but she hasn't left her flat since. She's terrified.
I've spoken to staff on site and it seems he has been there 4 years and has advanced dementia.

What the hell do we do? Do we move my mum?

Oh that sounds awful for you all, did the staff have any recommendations, is there anything they can do to make sure they don't come I in contact with each other? If your mum is scared to come out of her room you may have no choice but move her if she doesn't feel safe. Does the company running the assisted living have another facility she could move to? 💐

So sorry that sounds awful for your poor mum. If he does have dementia then he probably won't recognise her but she will probably still want to move (I certainly would) and I think she should.

This happened on Friday and the manager is on annual leave until next Monday.
One of the reasons we chose this place is its a very social place. There are lots of groups/activities going on and my mum is a very social person.
There are 2 other places but they are both 20+ miles away, and this place is 3 miles from me.

I visited my mum this evening and she said she saw him today when she looked out of her window. He was sat on a bench on his own which makes me think his dementia isn't too advanced yet, so he might remember her.
My mum wanted to come home with me. She's really distressed. I told her I will go in again tomorrow and find out who I can speak to whilst the manager isn't there.
It took us a long time to persuade mum to move and even longer to find the perfect place for her. Now we've got to start again.