Anon, I would look into whether you could still press charges. The statute of limitations depends on the crime, and the state.
I realize you may need to hire an attorney at some point, but I would start by calling your local law enforcement and ask. Or call your state child protective services. (I know, I know, many think CPS are horrible, but I know some really good and kind people who work in CPS.) But these government entities have a duty to investigate.
You will need specific names, dates, and locations of the abuse. If there is enough evidence to charge someone with a crime, the judicial system pays for the prosecution. Otherwise you may have to seek justice through the civil system--suing someone--and that will cost you money to hire an attorney.
Some state bar associations offer a 30 minute consult with an attorney for $35 (the referral has to come through the bar), and some attorneys will talk to you for up to an hour over the phone without charge.
Auntie Em