The family of Hae Min Lee, the murdered teen at the center of Adnan Syed’s vacated murder conviction, is appealing the Maryland judge’s decision to let Syed walk free.

Syed, who served more than 20 years behind bars and was the subject of the highly popular Serial podcast, was convicted in February 2000 of first-degree murder related to the murder, robbery, kidnapping and false imprisonment of Hae Min, his ex-girlfriend.