<human>: We live in NH. USA

My husband has a 7 year old son from a previous relationship. They have a custody/parenting plan in place from 2013, but they have been using it more as a guideline than following it to the letter. Over the weekend, there was a huge issue with her and my stepson (can give more information if needed) that led to her threatening to call the police, hold us in contempt of the parenting plan etc. She never called the police (as they never called us nor shown up at our residence, I believe she didn't call them because she didn't want a formal record of what she did to her son) and we have documentation going back about 2-4 years with regards to my stepsons living conditions, attitude and behavior when he returns from his mothers, things she has said to my husband etc.

We are (finally) looking into getting a family lawyer and will be starting the process of taking her to court. My husband had a family lawyer a while ago (2009 I believe) but he wasn't satisfied with that lawyer. We would like to "shop around" but we are unsure where to start and what we should look for in a family lawyer.

Can you condense the text into three sentences or less?
<bot>: Have custody issues, starting the process of taking stepson's mom to court to gain full custody. What should we look for in a good family lawyer.