What happens with the cell tower testimony that might affect the jury? Howmight this affect the outcome of the trial?

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Listen to Serial Podcast, Episode 5: Route Talk.  

What happens with the cell tower testimony that might affect the jury? Howmight this affect the outcome of the trial?

Jay was the State’s key witness against Adnan, despite having changed his story at least 6 times, because the police corroborated his story with cell records.

However, Cell Tower Pinging Technology, which was new at the time of Adnan's trial, has been proven unreliable and not admissible in some courts, and could help Adnan get a re-trial. Today, they are admissible in court to determine where someone probably wasn’t.

"rodney quicklt turned away and darted into a crowed of student" i thinks thats it but idk