From the start of December 2008 the most dramatic and exciting storyline yet for Debbie began which would continue well into 2009.
Debbie's best friend Jasmine had been dating local copper Shane Doyle in the hope of getting some inside information about the local criminally-involved family the McFarlanes. It was soon revealed that Shane; already known not to be the most law abiding bobby was in league with the McFarlanes.
Jasmine was getting involved in somthing far bigger and more dangerous than she first thought. Shane discovered that she knew what he was up to and after a massive fight he tried to rape her. His attack was quickly stopped as Debbie rushed in, grabbed a chair and smashed it over his head knocking him out, but while the girls' backs were turned he woke up and started attacking Debbie. In a fit of rage Jasmine grabbed a broken chair leg and smashed him over the head repeatedly - killing him.
Debbie and Jasmine, both in shock from what had just happened started to panic, then they decided they had to cover it up. They clean the flat and try to remove any evidence of what had taken place. Debbie asks Eli to help them, at first he is reluctant but Jasmine begs him to help her.
All three of them put Shane's body in the Dingle's van hoping to dig a grave to put him in, but soon they realise it will soon be morning and they won't have enough time, then Jasmine comes up with the idea to put him in the Home Farm lake.
Having succesfully disposed of him, they burn the rest of the evidence and leave a false trail to make it look like he had done a runner.
A few difficult weeks for the trio go by until Victoria Sugden falls into the now ice covered lake, while underwater she grabs a hand which she thought was Daz trying to rescue her but it was infact Shanes. A couple of days later Daz and Victoria go back to the lake to see if there was really a body down there, just as they decide to go home a hand floats into view - Shane's body has been found!
The police pay Jasmine a visit to break the news to her, so far they have no idea what really happened. A few days laterRoss tells the police he had seen Jasmine at Shanes flat acting stangely, but later gets arrested himself as he was seen fighting with Shane a few week before.
Debbie and Jasmine find it hard and end up getting back together, only to be found kissing by Eli who gets angry and thinks the girls will turn against him and turn him in.
Donna, while trying to prove Ross is innocent finds evidence that links Eli to the murder. Eli gets arrested and eventually tells the police everything. Meanwhile Debbie and Jasmine decide to go on the run not knowning the police are on their way to the villiage for both of them. Jasmine manages to get out of the village, but Debbie leaves it too late and gets into a police chase though the countryside. They eventually catch and arrest her, Jasmine makes it on to the bus and sees Debbie being led away.
While being questioned, Debbie keeps quiet not letting anything slip. Laurel however makes a statement which leads to Debbie being charged with manslaughter.
Debbie gets an unexpected visitor in prisonfrom Natasha Wylde, who for some unknown reason offers to pay Debbie's loan payments to Carl for 6 months.
A couple of weeks pass and Debbie is very low, until her new solicitor arrives, an expensive one paid for by Debbie's dad Cain. He convinces her to stay strong and sneaks her mobile phone to her that he had taken from her house. Later in her cell Debbie sees that there's a message on it, she calls the number and Jasmine answers. She tells Jasmine she loves her and to never come back and keep running.
Eli goes to the police again to try to help Debbie, he lets slip that the girls were an item, the police now think Debbie killed Shane out of jealousy and her charge is changed to murder.
Debbie's cellmate Tanya finds Debbie's hidden phone and smashes it, preventing her from being able to talk to Jasmine or her dad.
Eli discovers that Danielle is also in prison with Debbie, he comes up with a plan to break them both out by getting Danielle to attack Debbie so they both get moved to a hospital to recover which would be easier to get them out of.
Everything goes to plan until Debbie tells Eli that she doesn't want to run away, but follow everything though to the end.
A few days later the start of Debbie trial begins, Jasmine barges into the courtroom and confesses everything. Later both of them face their sentacning, Jasmine gets charged with Murder.
After a few weeks Debbie is released and returns home to a newly decorated house and a party. She later goes to visit Jamine at the prison, Jasmine tells her she will always love her and to move on and not visit her anymore, Debbie tearfully agrees. and they say their goodbyes.
Shorty after their final farewell Debbie learns that Jasmine is to be transfered to another prison in Peterborough, is this the last we'll see of Jasmine?