What steps should I take next to better this situation?

If they file the charge you should get a lawyer. If you have no prior arrests you may even be able to get it dropped.

It's just an affidavit that has nothing at all to do with sentencing. The person needs to hire a lawyer. That would have a huge affect on the...

How can I give additional information on a court case?

The prior thefts aren't relevant. If you really want to put this person in jail for something that will soon be legal you can call their...

How does my family fight back against a false accusation, and get my sister back home?

Your only hope of getting your sister back is to hire an experienced dependency lawyer to fight DCF. These cases are expensive, but how much is...

If you are not guilty it may be better for you to fight the case than to go through PTI. Whether you stay in PTI is totally up to the state...

If you fail a ua on pretrial release do u sit in jail untill court or get put back on pretrial release?

It is up to the judge whether you sit in jail or go back on PTR. Most judges will let you sit in jail. Get a lawyer.

Can I just pay a fine to get my license back from a underage from 7 years ago?

Check with the Clerk of Court and call the DHSMV.

If I miss a pretrial intervention class will the send out a warrant for my arrest

No. But they could kick you out of the program. Then the judge could issue a warrant.

If these were simple batteries and they have no prior charges they should spend no time in detention. They both need a lawyer.

How bad is affecting the case if she is having felony on her record?

I don't know why her having a felony would affect your case but that is an issue you need to discuss with an immigration lawyer.