I can’t help out much about counseling for the child, but I can give some advice for the addiction that the father has and his imprisonment. In some countries a lawyer can be given to you by the federal court. If you happen to live in one of those countries, you can request for the lawyer to investigate the case and find out what the charges are. Now for the addiction. People get addicted to many things, from heroin to even sniffing paint or self harming. Since I don’t know what kind of addiction nor would I ask such a touchy thing as to be given the knowledge of it, I can only say that all addictions are breakable with the right mindset and determination to not do it. Different methods can be applied depending on what the addiction is. Try seeking counseling for it. Also don’t forget that God can always help. Sometimes saying the Our father when one is tempted to repeat an act of addiction will eliminate the temptation to atleast some degree if not entirely. It’s how I broke free of my (and if you have any children around get them AWAY FROM THE COMPUTER) masturbation addiction. Normally I would say a specialized prayer that I would make up in my head but I think the Our Father is best for this.
Our Father, who art in heaven, hallow is thy peace. Thy kingdom come, thy word be done, on earth, as well as in heaven. Give us this day, our daily bread, and forgive us for our trespasses, as we forgive those who trespass against us, and lead us not into temptation, but deliver us from evil, Amen.
God bless you, your expected child, and your family.