Evidence: Jay's story changes multiple times between his first interview and his final story. (Serial Podcast Season 1 Episode 4, Serial Podcast Timelines chart).
Reasoning: If Jay is changing his story a lot then it is not very credible because it could mean he was covering for someone.
Evidence: There is no DNA evidence or fingerprints linking Adnan to this crime. (Serial Podcast Season 1, Court transcripts).
Reasoning:If there is no evidence, which there isn't, linking Adnan to the crime, it supports that he did not murder Hae.
Evidence: According to former Detective John T. Risher, in Jay's interviews he is lying to minimize his involvement and protect someone. (Serial Podcast Episode 8).
Reasoning: If Jay is trying to protect someone, he is probably lying about Adnan's involvement in the murder to protect this other person.
Evidence: Jay led the police to exactly where Hae's car was parked. (Serial podcast episode 8).
Reasoning: Jay knows where the car is so he and person X could have left the car there and framed Adnan for the crime.
Evidence: Jay borrowed Adnan's car and phone on the day of the murder. (Serial podcast, episode 6).
Reasoning: This could have been premeditated to ensure Jay had transportation and communication for carrying out the crime with Person X. The use of Adnan's belongings provided a convenient scapegoat. Also, Adnan and Jay were not close freinds so why would Jay ask for his car?
Evidence: Prosecution claimed Adnan killed Hae due to jealousy after their breakup, but people who knew him say he was just slighty sad and got over it pretty quickly. (Serial Episode 6)
Reasoning: Jay and Person X might have had stronger motive then Adnan.
Evidence: Jay was most likely familiar with Leakin Park. (Serial Episode 5).
Reasoning:Leakin Park is known for criminal activty and Jay was involved in previous criminal activity.
Evidence: Jay mentioned other people in his initial police interviews (e.g., Jennifer Pusateri, though she was cleared). The identity of "Person X" is speculative but aligns with the idea that Jay wasn't acting alone.
Reasoning: Jay may have relied on "Person X" for assistance in overpowering Hae, moving the body, and digging the grave.
Evidence: Hae was strangled and there was no defensive Injuries on her. (Autopsy Report)
Reasoning: This supports that she was overpowered by both person X and Jay.
Evidence: The police might have interfered with Jay's interview for the hour before the tape recording started because they wanted to close the case. (Serial Episode 8). Reasoning: The police could have just wanted to close the case and could have basied the interview with Jay to close the case faster.