Juju Chang

In the years since Juca's conviction, that prosecutor, Anna Siga Nicolazzi, did all right for herself, even becoming one of those high-profile legal eagles on TV. I've been prosecuting murderers for 15 years. I've never lost a homicide case. But the Juca case raises questions about that perfect record. Was hers a win-at-all-costs mentality?

Did Nicolazzi violate court rules by not telling Juca's defense team or the jury that she had helped the informant stay out of jail?

Did Nicolazzi violate court rules by not telling Juca's defense team or the jury that she had helped the informant stay out of jail?

Did Nicolazzi violate court rules by not telling Juca's defense team or the jury that she had helped the informant stay out of jail?

Coming up, the tables have turned. Now it's the star prosecutor who takes the stand to defend her handling of the Juca case. Will the undercover mother finally win freedom for her son? When 2020 continues...

Coming up, the tables have turned. Now it's the star prosecutor who takes the stand to defend her handling of the Juca case. Will the undercover mother finally win freedom for her son? When 2020 continues...

Coming up, the tables have turned. Now it's the star prosecutor who takes the stand to defend her handling of the Juca case. Will the undercover mother finally win freedom for her son? When 2020 continues...

November 2015, John Juka has now been in prison for more than a decade. In this interview with Crime Watch Daily, he maintains that he is innocent.

November 2015, John Juka has now been in prison for more than a decade. In this interview with Crime Watch Daily, he maintains that he is innocent.

November 2015, John Juka has now been in prison for more than a decade. In this interview with Crime Watch Daily, he maintains that he is innocent.

For his mom, Doreen, the trips to visit her son in jail have been a living hell.

For his mom, Doreen, the trips to visit her son in jail have been a living hell.

For his mom, Doreen, the trips to visit her son in jail have been a living hell.

But while Juca languishes behind bars... My job is to fight for justice. ...the legal eagle who sent him there is flying high. Did they find a gun? Telegenic former Brooklyn prosecutor Anasiga Nicolazzi brandishing that undefeated record as host of two crime shows on Investigation Discovery. Let me take you inside the fight for justice. She comes out and she says, you know, I've never lost a case.

But while Juca languishes behind bars... My job is to fight for justice. ...the legal eagle who sent him there is flying high. Did they find a gun? Telegenic former Brooklyn prosecutor Anasiga Nicolazzi brandishing that undefeated record as host of two crime shows on Investigation Discovery. Let me take you inside the fight for justice. She comes out and she says, you know, I've never lost a case.

But while Juca languishes behind bars... My job is to fight for justice. ...the legal eagle who sent him there is flying high. Did they find a gun? Telegenic former Brooklyn prosecutor Anasiga Nicolazzi brandishing that undefeated record as host of two crime shows on Investigation Discovery. Let me take you inside the fight for justice. She comes out and she says, you know, I've never lost a case.

A cheater, Doreen says, because she didn't disclose that apparent deal with the prison snitch who helped convict her son. But remember, that star witness has now done a 180. In this sworn affidavit, John Evito says he lied to prosecutors in exchange for what he says was a deal to keep him out of jail.

A cheater, Doreen says, because she didn't disclose that apparent deal with the prison snitch who helped convict her son. But remember, that star witness has now done a 180. In this sworn affidavit, John Evito says he lied to prosecutors in exchange for what he says was a deal to keep him out of jail.

A cheater, Doreen says, because she didn't disclose that apparent deal with the prison snitch who helped convict her son. But remember, that star witness has now done a 180. In this sworn affidavit, John Evito says he lied to prosecutors in exchange for what he says was a deal to keep him out of jail.

And then more dominoes start to fall as two more of Nicolazzi's witnesses recant their testimony, including Juca's then-girlfriend, Lauren Calciano. In this sworn affidavit, Calciano says she lied on the stand after Nicolazzi and police put relentless pressure on her threatening to make this hard for her father, who was in jail at the time.