Venus

Initially is 2015 tax return and some recent (oct 2016) payslips.  I can't mail till Tues as its a holiday but I will try calling to check why and what to send before I send it.

~~One post edited to removed personal information and another post removed for the same. Please do not post anything that contains personal information. I understand you are trying to provide as much information to get the best and most accurate help you can. You can post the charge and any other details that do not identify him.~~ 
 
Mod hat off
 
I would forward any and all information you have to ICE and the local USCIS office that your sister lives near. 
I would also give your nieces father a heads up if your sister insists on letting that man in her house again. He has as much responsibility to keep his child safe as her mother. 

There is another issue here that you should be aware of.

If or when they decide to file for AOS his arrests/convictions will need to be disclosed. Depending on the particulars he may not be approved for a GC.  If he has one charge for DV it can fall under the petty offense exception and he will be OK to adjust. But depending on the particulars it may not be considered 'petty offense exception'. If he has more then one charge then he can not get this and will not be able to adjust. There are many factors to consider and because the abuse involved a child it makes it more complicated. All Im saying is he may not be able to get the GC.

Also once he has the GC (if it goes that far) and he gets convicted for DV AGAIN (which is most likely to happen) he can have his status stripped and be deported. They do not mess around with immigrants convicted of DV.
 
However the best advice I can give you to protect your family is to REPORT him when he does violate the restraining order. Your sister may not be happy- but violating a restraining order will make him deportable. 

If your sister insists to get married to the scumbag I would call DCF and tell them about the abuse  that your niece suffered, and probably DCF will take your niece away from your sister, she failed to protect her daughter and she  is putting her daughter in harm's way AGAIN. She should care about her child's safety and if she doesn't  care then be your niece's voice. Speak out against Domestic Violence!

It sounds like she is displaying the classic, victim of domestic abuse tendencies. It's likely that the more you push against him, the more she will pull away from you. Look at this website and see if it can help give you some direction. 
http://www.nationaldomesticviolencehelpline.org.uk/support-a-friend-or-family-member-experiencing-domestic-violence.aspx
 

She needs to keep him away. If she lets him back in the house she may lose custody of her child. Her ex already knows what happened, it would not take much for her to lose her daughter. No man is worth losing a child. 

Yeah it's very good they did not marry. This will be a lot easier than if they had. 

It's best for her or him to get a ticket back home. You don't want him to try to roam around until he's illegal. You need to make sure someone gets him out of the country, I'm assuming she's not going to marry him at all and the marriage is off, so he has no path to the US that is legal. 

I'm pretty sure she could contact USCIS with the DV info and telling them what happened and that she is not going to marry him at all before the 90 days are up. 

Don't help him do ANYTHING. Don't help him with his social security card, Don't help him with a license. Separate him as far from yourself and your sister and her family ASAP. DO -NOT- HELP HIM. You are NOT obligated to in any way shape or form. The most help any of ya'll need to give him is help out of the country and healing for your sister and her family.


Also, try to help your sister understand he is an abuser. NO ONE should do that to anyone. NO ONE. Even if she loves this man with all her heart, she needs to leave him for the safety of herself and her child. If anyone touched my kid, I don't even know how I would respond, I know it would be angry and spiteful and not nice at all, but I would -never- bail them out, I'd most likely want them to rot in prison or be sent back to their home country. Which ever is worse.

No but ICE can. 
 
https://www.ice.gov/about
 
To the OP, follow the advice by Ash.1011 above but also let ICE know about the situation. 

She hasn't married him so that is a good thing. It will be an easy seperation for her. She will not have any obligations. She just need to protect herself and her daughter. 
 
Since he was arrested for DV she can prevent him from returning to her home. Since they will not marry he has to return to the DR before the 90 days. If not he will be illegal. Unfortunately, your sister can't "deport"/ force him to leave the US. And by his actions it seems he will probably stay as an illegal.

Have her change all her locks on her house.
 
Call and talk to the police and file restraining order.
 
If need be present a one way ticket for him to go away forever.
 
She has not signed anything legally making her responsible to support him yet, so tell her to get rid of him quickly.