Adnan Syed

The high court did not provide an explanation for why it declined to hear the appeal by Syed, who was convicted in 2000 of strangling to death his former girlfriend, Hae Min Lee.

Maryland's second-highest court has upheld a ruling vacating Syed's murder conviction, which the hit podcast covered. Syed will be retried in a lower court, provided Thursday's ruling isn't appealed.