Coronation Street fans spotted Kelly Neelan's big error in court which could see Corey Brent escape justice.
The trial for Seb's murder got underway on the long-running ITV soap this week.
Nina Lucas took the stand on Wednesday's episode to give her account of what happened on the night of the killing.
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Nina has finally been able to recount who killed Seb - which was revealed through a series of surreal flashback sequences earlier this week.
Both Corey and Kelly are blaming each other for the killing and are providing different accounts of the incident.
Nina has revealed that it was Corey who killed Seb, while Kelly actually tried to pull him away.
But on Friday, Corey's friend Eli said he heard Corey yelling at Kelly to get off Seb.
Eli lied, saying: "I just remember he was shouting for Kelly to get off Seb."
But Kelly, shocked by his lies, interrupted court proceedings and said: “He’s lying, you’re a liar.
"I’m not going to keep my mouth shut and sit here while people tell lies about me."
However, Corrie fans now think Kelly's outburst could see Corey escape justice.
Ryan said: "I wish Kelly didn't do that outburst."
Simone tweeted: "I don't blame Kelly for going off like that in court, she's getting the blame for something she didn't do."
A third wrote: "I have this nagging feeling Corey is gonna get away with it and Kelly is gonna get blamed."
And Nessie said: "Poor Kelly. I think, no I know I'd probably be the same in a courtroom if people were lying about me and trying to fit me up for a crime they were guilty of and not me."
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