In the years since season one concluded, Sarah Koenig wrote updates about important developments in the case. In 2015, the cell phone expert who testified at Adnan Syed’s trial said he no longer stood behind his testimony. In 2016, Adnan's attorney introduced new evidence and presented a case for why his conviction should be overturned. Serial covered what happened, day by day, in the three audio updates below. In 2019, Maryland’s highest court reversed a decision to give Adnan a new trial.