Adnan Syed — the subject of the hit crime podcast “Serial” — was released from prison on Monday, following a court decision to vacate his conviction for the 1999 murder of his ex-girlfriend Hae Min Lee.

The conviction was thrown out by Baltimore Circuit Court Judge Melissa Phinn, who ruled the state had failed to share evidence with Syed’s attorneys that could have helped his defense.

The now-41-year-old Syed — who was arrested at 17 and has spent more than two decades behind bars — was calm and stoic as Phinn made her ruling, the Baltimore Sun reported. His family members in the gallery wept openly.

“All right Mr. Syed, you’re free to join your family,” Phinn said as the hearing ended.

Syed, who had been brought to court in handcuffs, was unshackled and exited the courtroom to applause, the Sun reported.

The judge placed Syed on home detention with GPS monitoring while prosecutors have 30 days to decide whether to seek a new trial.

The about-face comes after a year-long investigation by the Baltimore City State’s Attorney’s Office and Syed’s defense found new evidence that included two alternative suspects who may have killed Lee. Investigators knew about the other suspects during the initial probe into Lee’s killing, and never ruled them out.

One of the suspects, prosecutors said, had even threatened Lee, saying “he would make her disappear.”

While prosecutors did not say Syed was innocent, “the State no longer has confidence in the integrity of the conviction,” the office of Baltimore State’s Attorney Marilyn Mosby said last week.

Syed has long maintained his innocence in the murder of his former high school girlfriend, who was 18 when she was strangled to death and buried in a Baltimore park.

Syed’s initial trial for Lee’s murder, in 1999, ended in a mistrial. It was a subsequent 2000 trial in which he was convicted for the killing, and sentenced to life in prison.

His case rose to prominence in 2014 with the first season of journalist Sarah Koenig’s Peabody Award-winning crime podcast, which raised questions regarding Syed’s conviction to a national audience.

In 2016 a lower court ruled that Syed was due a retrial over concerns that his defense attorney at trial had failed to contact a witness who could have backed up his alibi, and that he had otherwise gotten ineffective counsel. But that decision was appealed to Maryland’s highest court, which ruled against Syed in 2019.

Syed then appealed to the US Supreme Court, which declined to take up the case.

During Monday’s hearing, Lee’s brother said he felt betrayed by prosecutors, as he believed the case was long settled.

“This is not a podcast for me. This is real life,” Young Lee said.

Syed did not speak during the proceedings, but his attorney Erica Suter told reporters of his reaction afterward, “He said he couldn’t believe it’s real.”

At a press conference outside the courthouse, Mosby, the State’s Attorney, said she understands why Lee’s brother feels duped.

“But I also understand the importance as the administer of the criminal justice system to ensure equality and justice and fairness,” she added. “That is entitled to the defendant, as well.”

With Post wires