Via Serial’s Facebook page.

Because it’s been a minute since Serial dominated the cultural conversation, news broke today that Adnan Syed, the convicted killer at the center of the hugely popular podcast, has filed a briefing arguing for a new trial.

As anyone who’s listened to the podcast will tell you (if you’re not one of the 40 million people who downloaded it by now), Syed, now 34-years-old, was convicted of killing his ex-girlfriend in 1999, when he was in high school. He claims he’s innocent and that his then-lawyer, who’s now deceased, botched the case for him. Is he lying? Is someone else lying? Who really killed Hae Min Lee? Those are the questions Serial host Sarah Koenig painfully and obsessively tried to answer during the podcast’s 12-episode run.

But Syed’s story didn’t end with the podcast. As the Baltimore Sun reports, Syed’s attorney has filed a 31-page brief with the Maryland Court of Special Appeals, which argues that his conviction should be tossed out because his previous lawyer neglected to interview a key alibi witness.

“The errors by trial counsel were of such a fundamental nature that Syed must be given a new trial,” his attorney C. Justin Brown argues in the brief. “The circumstances here are worse than the circumstances of any other case in which a court has found ineffective assistance of counsel relating to an alibi issue.”

The brief also claims that his lawyer at the time, Christina Gutierrez, never inquired about the possibility of a plea deal with prosecutors. Syed is currently serving a life sentence.

The alibi witness at the center of the briefing is one of Syed’s classmates at the time, Asia McClain, who wrote in a letter to him that she was with him in the library at the time prosecutors say he strangled Lee.

So what’s next for Syed? The Sun says it’s now up to the Attorney General’s Office in the state of Maryland to contest the briefing:

The Attorney General’s Office can now contest Syed’s claims in an official response that’s due April 30. Syed has an opportunity to reply in a filing 20 days after the state’s response. In June, the Court of Special Appeals could hear oral arguments.