sad thing is about the laying down with parent B she lied to dad saying she was on birthcontrol when she wasn't...
Come on - he knew as well as anyone over the age of about 13 that when you sleep with someone, there's a risk of pregnancy.
when mom found out she was pregnant dad tried everything he could to make sure she had the baby. He wanted it and she didn't. She was going to get an abortion but came up with the money too late in pregnancy then continued to do drugs and drink trying to ruin the pregnancy that way however it didn't work.
Do you see where this statement completely contradicts the first? Mom lied about birth control because....what, she
wanted an abortion?
Does that honestly make sense?

SPECIALLY because a termination will often be provided at no cost to an indigent patient?
dad tried to get her put in jail till she had the baby so she couldn't harm it anymore but because he was under 18 nobody was listening to him.
I don't think you're being told the truth. Sorry, but that's about as honest as I can be here. He tried to get her put in jail? Because of fetal endangerment, right? But his
age prevented ANYONE from listening? No, that's not how it works.
That and the way all this works he probably couldn't have proven all that unless she was drug tested or hired a private investigator. As far as I know dad never found out till later that she was too far along to have the abortion and was told she did. 9 months later he find out theres a child. messy situation from the begining. So it's no suprise its still continuing.
Hon, seriously, you're not being told the truth here. It may well be that Dad himself is unsure, or was told lies, or just doesn't understand - but I can promise you, that things didn't happen the way they've been presented to you.
oh and as for your question they probably never called the cops. Theyre mutual friends with her so at the time they weren't trying to get involved. Plus they did drugs here and there with her at the time. not very good quality witness Im sure. Sadly its all hes got. which is why I said his case is really crap right now unless things progress in his favor as far as proof goes.
So they didn't really give a flying crap about the welfare of the kid? Lovely. The courts aren't going to give that kind of testimony the time of day.
Barbie, look. At the moment, it seems that your husband is either not telling you what exactly happened, or that he doesn't understand/was lied to about what exactly happened. But that really, truly, is neither here nor there.
Your husband needs PROOF. Evidence. That either Mom is unfit, or that kiddo's circumstances have changed considerably (ie, Mom died or something).
By all means (as I believe you've been advised several times) have him speak with an attorney. But his chances of custody are slim to none.