I'm Josh Manquets. Don't testify in your own defense. The prosecution will carve you

to pieces on the witness stand. That's the advice a lot of attorneys give their clients

especially in a murder case. This is the story of a young man who took that advice and

later regretted it. It's the story of a police investigation, if you can call it that,

that ended in a perversion of justice. How all of that was undone is a story I've always

found more inspiring than depressing because a good part of this is about people doing

the right thing again and again. It's also about the value of knowing your right and

never losing hope. That said, how would you like to lose 18 years out of your life? This

is a Bronx tale. Sing Sing correctional facility, the maximum security

prison in New York. This is the big house, home to some of the worst of the worst. Killers,

rapists, drug dealers. Thank you. It is not where you'd expect to find this gentle woman.

Sing Sing to the comedy grandma. Grandma is Sister Joanna Chan, a married

old nun. I began working as sing Sing more than 12 years ago. This is the battle about

general dope. Grandma volunteers at the prison working with inmates in a theater program.

She even teaches them Chinese. Through the years grandma has helped dozens of men

but she says this inmate here on stage, a convicted killer, has changed her.

It's just so brave. Watching him all these years, I take such courage myself watching him.

Sister Joanna remembers the first time she met this inmate. He was sitting alone eating.

He said my family sent me 30 pounds of food so I said your family must love you very much

and he said yes because they know I'm innocent. And that's how the whole story began.

A story that began with the unlikely friendship between a nun and a convicted killer would

grow into a quest that would shake the faith of even those sworn to uphold the law.

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