"48 Hours" investigates the claims and stunning allegations behind Vincent Simmons' conviction

Vincent Simmons was released from a Louisiana prison in February after serving 44 years for attempted aggravated rape of twin sisters. He says he didn't do it – but the sisters say he's guilty. Are the sisters telling the truth or was this a lie to protect a family secret? "48 Hours" contributor David Begnaud investigates the case against Simmons and hears for the first time from a woman who says she knows the truth. [From "THE FARM"] BOARD MEMBER [to other board members]: In 20 years, I'd come up with something too. BOARD MEMBER: Mr. Simmons after listening to testimony and going over the reports the board has voted at this time to deny your request for parole. KAREN TO VINCENT: We came today not to free you from your prison, but to free us from our prison. SHARON SANDERS: What are you doing here then? Since you're innocent, what are you doing here? DANA BROUILLETTE [to Brian Andrews]: He came out and told me. There was never a Black man. DANA BROUILLETTE [to Brian Andrews]: He had gone down Little California Road and he locked Sharon in the trunk, and he said the sex between him and Karen was consensual. He said but the other one was a little hellcat. … That's the one that put the scratches on his neck. DANA BROUILLETTE [to Brian Andrews]: I maybe should have come forward a long time ago … I really did think the man got released. JUSTIN BONUS [in court to Simmons]: You're free, brother. KAREN SANDERS [in the courtroom]: He went in guilty. He is guilty now. And guess what? He will die guilty. So, I'm, I'm happy. I got 44 years.

For identical twins Karen and Sharon Sanders, life is broken into two parts: before May 1977 — and after. They say what happened one night that May changed everything. VINCENT SIMMONS [addressing board members: We didn't have none of this evidence. None of this evidence was presented before the jury. ANOTHER BOARD MEMBER: Oh yes, yes — he did it. Ain't no doubt in my mind. SHARON TO VINCENT: Today I am closing the door to my pain. … I'm letting go. VINCENT SIMMONS: Y'all put me here.

Karen Sanders: Every time I talk about it, it makes me feel like I'm 14 again. BOARD MEMBER: You were the only one handcuffed in the lineup? When the time came for Vincent to speak, he had questions. SHARON SANDERS: We did? No, a choice that you chose to make put you here.