When the attorney you describe as excellent left the firm, you should have received a letter advising you of his/her departure and telling you that you have the right to stay with the firm, go with the attorney who is moving, or hire another firm entirely. If you have not received this notification yet, you can either request your file from the firm or when you hire a new attorney they can request the file on your behalf.
YOU ABSOLUTELY NEED AN ATTORNEY! These are very serious charges, felonies. A first degree felony can carry up to a possible 20 year jail sentence. You must call an attorney immediately to help you deal with this situation appropriately.
A minor can petition the court to become legally emancipated from her parents when she is 16 years old. There are a number of factors the court considers in deciding whether or not it is appropriate to emancipate a minor. If medical needs are being ignored, at a minimum, the minor in question needs to tell a school official what is happening so that person can ensure the minor is not in imminent physical danger.
In addition to getting a Protection From Abuse order, which is the first thing you should do, you should get a divorce and custody agreement in writing. If you go to your local family court they will be able to guide you in the right direction, tell you what forms to file, etc. The people who work in the family court division are a wealth of knowledge, and even though they won't be able to give you actual legal advice, they could be able to give you what you need to do the work on your own...
The worst case scenario is probation for the first DUI may be revoked and he may have to serve the maximum sentence on the first DUI. If your friend was admitted to an ARD program for the first DUI (you mentioned CRN evaluation and classes so I am assuming this is the case) and fulfilled ALL of the requirements, it may be possible to petition the judge to not revoke the probation and allow him to finish his sentence on the second. Advise your friend to retain an attorney experienced in DUI law...
Although you can leave the father's name off of the birth certificate, that alone will not terminate his parental rights. You must file with the court to have the rights officially terminated. Even with the father's consent, this is a very difficult thing to get a court to do. It will usually only be done if the mother is now married and her husband wishes to adopt the child in question.
As you know, there are specific procedures that must be followed. I definitely advise you to hire an attorney because adoption is a complicated matter. But because you want to do it yourself, I advise checking the below link. There is a lot of useful information there. Best of luck to you Ryan.