It was a huge police effort to convict the three - with more than a thousand statements taken and more than three hundred vehicles traced which had passed the layby on the A358 where Catherine's body was found.
Forensic investigations played a key part in their conviction.
Ian Axton reports:
For the family of Catherine Wells-Burr today's verdict has come as a huge relief. They've been in court for much of the eight weeks of the trial.
We heard a little earlier their reaction outside court, shortly after the jury delivered its verdicts.
Jayne and Phillip Wells-Burr spoke to ITV Westcountry about their daughter.
Det Insp Simon Crisp from Avon & Somerset Police:
Catherine Wells-Burr's family gave a statement to the media after three people were convicted of her murder today:
Two men and a woman have been convicted of killing Somerset woman Catherine Wells-Burr.
Her former boyfriend Rafal Nowak, Anna Lagwinowicz and Tadevz Dymtryszyn had all denied the murder of the 23-year-old, but a jury today decided that they had committed the crime.
Catherine Wells-Burr was found dead in her burning car near Chard last year. Nowak, Lagwinowicz and Dymtryszyn will all be sentenced on Monday morning at Bristol Crown Court.
David Woodland reports.
This was a wicked crime committed against a bright and innocent young woman who had her whole life ahead of her. Rafal Nowak, Anna Lagwinowocz and Tadevz Dymtryszyn took both Catherine's and her family's future away from them on the night they carried out this calculated killing. They then tried to cover their tracks and mislead us in a bid to get away with what they had done.
Murder is a terrible crime but what makes this worse is the intricate planning that took place while Nowak pretended to care about Catherine – playing the doting boyfriend while plotting to take her life for a few thousand pounds. Their plan unravelled despite their best attempts to mislead us and today they have been found guilty of Catherine's murder.I would like to pay tribute to Catherine's family who have remained strong and dignified throughout. Their support to the investigate team has been invaluable.
While the verdict/sentence will never bring Catherine back I hope it goes some way in providing some closure knowing that justice has been done. Finally I'd like to thank our first rate prosecution team led by the CPS here in Bristol who coordinated a complicated and challenging case through to today's final conclusion.
"We have worked closely with Avon and Somerset police throughout this extremely complex investigation. This investigation was meticulous. By piecing together numerous pieces of evidence the prosecution team were able to prove beyond a reasonable doubt that Rafal Nowak, Anna Lagwinowicz and Tadevsz Dmytryszyn were guilty of this ruthless murder motivated by greed."
A jury has found two men and a woman guilty of killing Somerset woman Catherine Wells-Burr.
Her former boyfriend Rafal Nowak, Anna Lagwinowicz and Tadevsz Dmytryszyn ad all denied the murder of the twenty three year old, but a jury today decided that they had committed the crime.
The defendants had spent months leaving a false trail for detectives before the murder, creating fake profiles for Miss Wells-Burr on adult websites and sending texts to her phone from a supposed mystery lover.
Business graduate used a number of social networking websites and at first Nowak and Lagwinowicz had attempted to lure the 23-year-old into flirting with other men, by targeting her accounts with suggestive messages.
But their plan was thwarted when Catherine either ignored the messages or replied "I have a boyfriend, leave me alone".
The killers instead launched a number of fake profiles for Miss Wells-Burr to leave a false trail for officers investigating after her death.
After their arrest Anna Lagwinowicz made another attempt to cover her tracks from prison, attempting to send a fake anonymous letter to prosecutors that claimed Rafal Nowak had first tried to hire a hit man to kill her.
When this failed, the letter stated, he decided to murder Miss Wells-Burr instead and plant evidence to point the death squarely at Lagwinowicz's hands.
However her scheme backfired when prosecutors were told by her cell mate about the letter and instead used details contained in the note to compile further evidence for her prosecution.