Former Dorset Police constable Timothy Brehmer killed mother-of-two Claire Parry after she sent a text message from his phone to his wife saying: “I am cheating on you.”
Ms Parry, 41, died during what Brehmer described as a “kerfuffle” in his car in the car park of the Horns Inn in West Parley, Dorset, on May 9 last year.
Brehmer, of Hordle, Hampshire claimed the married nurse accidentally suffered the fatal injury while he was trying to push her out of his Citroen car so he could drive away.
He was cleared of murder by a jury following a trial at Salisbury Crown Court but had previously admitted Ms Parry’s manslaughter.
Brehmer, then 41, was jailed for 10-and-a-half years in October.
His sentence was referred to the Court of Appeal by the Attorney General’s Office (AGO) under the unduly lenient sentence scheme.
At a hearing earlier this month, which was attended by Ms Parry’s mother and her husband Andrew Parry, lawyers representing the AGO argued that the jail term handed to Brehmer was too short and should be increased.
The Court of Appeal also heard a bid by Brehmer to have his sentence reduced.
The court will give its ruling on Friday on whether Brehmer’s sentence should be increased or reduced – or whether it should remain unchanged.
Mr Justice Jacobs said in October that he was sentencing Brehmer for manslaughter on the basis that he “lost control” after Ms Parry sent the text message to his wife Martha, also a police officer.
“I am sure that you did deliberately take Claire Parry by the neck, applying significant force with your forearm or the crook of your elbow for a period of time while she struggled against you, thereby causing the severe neck injuries which the pathologist described,” he said.
The judge said that as a “trained and experienced” road traffic police officer, Brehmer would have known Ms Parry was seriously injured.
“Yet you did nothing to try to help Claire Parry,” the judge said.
“You did not ask her how she was.
“That was because you knew how she was.”
In a statement after Brehmer was jailed, Ms Parry’s husband, also a police officer, said: “Brehmer is a well-practised liar with years of experience.
“He has shown himself, as the trial exposed, to be consistently dishonest, deceitful and devious.
“We do not accept his version of events and all the inconsistencies that it contains.
“Claire was a caring nurse practitioner who helped many people in a career of over 20 years.
“She was a loving family member and a doting mother who leaves behind two young children.
“Her energy and enthusiasm for life were infectious and our lives are poorer without her in them.”
The Court of Appeal’s ruling will be delivered remotely at 10.30am on Friday.