“The motion filed today supports a new trial for Syed based on a nearly year-long investigation that revealed undisclosed and newly-developed information regarding two alternative suspects, as well as unreliable cell phone tower data,” State’s Attorney Marilyn Mosby’s office said in a news release.

Syed, 42, has maintained his innocence for decades and captured the attention of millions in 2014 when the debut season of the “Serial” podcast focused on the case and raised doubts about some of the evidence, including cellphone tower data.

Prosecutors said they weren’t asserting that Syed is innocent, but they lacked confidence “in the integrity of the conviction” and recommended he be released on his own recognizance or bail.

Prosecutors said a reinvestigation of the case revealed evidence regarding the possible involvement of two alternative suspects other than Syed.

The two suspects may be involved individually or may be involved together, the state’s attorney’s office said.

One of the suspects had threatened Lee, saying “he would make her (Ms. Lee) disappear. He would kill her,” according to the filing.

Syed has served more than 20 years in prison for the strangling of Lee, who was 18 at the time. Her body was found weeks later buried in a Baltimore park.

Additional reporting by AP.