Sarah investigates how a potential alibi surfaced and then disappeared again at the worst possible time for Adnan's case.

Friends say Adnan was sad when Hae dumped him, but not crazy sad, just normal sad. The prosecutors say he was rage-filled and vengeful. Which is it?

Three weeks after Hae went missing, a man found her body in a city forest. But his story is strange and his past is even stranger. Did he really just stumble on her by accident?

The detectives find a lead and bring Jay in for questioning. He tells them the story of 13 January, but a few weeks later his story changes.

Adnan challenges Sarah to recreate the state's timeline by driving from Woodlawn High School to Best Buy in 21 minutes.

Sarah weighs all the other circumstantial evidence prosecutors had against Adnan, including curious behaviour, a dramatic note and an unexpected mid-afternoon phone call.

Sarah learns about a case strikingly similar to Adnan's - a key witness, cell records, young people, drugs. Contacting the defense attorney, she gets more than she bargained for.

The state's case hinged on Jay's credibility; he was their star witness and also their chief liability. So how did the jury make sense of Jay?

New information is coming in about what may or may not have happened on 13 January 1999.

Adnan's trial lawyer was renowned defense attorney M Cristina Gutierrez - tough, savvy and smart. But Adnan was convicted, and a year later she was disbarred. What happened?

Almost everyone says 17-year-old Adnan is a good kid, helpful at the mosque, respectful to his elders. But people from his past called Sarah with tales of a different kind of boy.

On 13 January 1999, Adnan Syed was either a vengeful ex-boyfriend guilty of planned murder or he was framed for a crime didn't commit. We assess all the evidence to see what sticks.