Family Law Questions? Ask a Family Lawyer Online.
so you want custody of your son?
does she currently have full custody ?
what state is that Order from?
well, you will need to file to have the custody order changed. since it was in NV and you are in Alaska and they live in FLA, you will first need to have the matter transferred to the county court where you live. it is a complicated process and not one that i would suggest you do pro se - so at some point you will need to consult with a local family law attorney
you have a very good basis for making the request and since he is not doing well in school, you could win custody. you should have all your information as to educational resources in your area, as well as information on the home environment you can provide and how this will all be in the best interest of your son. you do not want to elaborate on child support or give any indication that you feel you have been paying long enough, etc.
if you are granted custody, you will get your child support. but a court does not want to hear that a parent wants custody for any reason but for the betterment and wellbeing of the child
i suggest you contact the Alaska Bar Association for a referral service so you can get the local legal advice you will need to accomplish this correctly and timely.
here is that information and you can also consult on pro bono assistance to see if you would qualify for free or low cost legal fees.