'Mr Justice Jacobs told Brehmer he was sentencing him "on the basis you lost your self-control following the sending of the text message to your wife where the affair was revealed, rather than on the basis that you had no intention to kill or cause really serious harm".
"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...severe neck injuries," the judge added.
"The evidence from the pathologist was that those injuries which she described as 'severe' on a scale of mild, moderate or severe resulted from the application of significant force to the neck for a period of a minimum 10 to 30 seconds and possibly longer.
"She said it was difficult to envisage a situation where a struggle in the car imparted the necessary degree of force or could explain the extent and severity of the neck injuries."
Brehmer told the trial he had left the car without realising Mrs Parry was "poorly".
However, the judge said as a trained police officer "it must have been obvious" that Mrs Parry was not breathing.
"Yet you did nothing to try to help Claire Parry," Mr Justice Jacobs added. "You did not ask her how she was. That was because you knew how she was.
"You could not possibly have thought, as you said in your police interview, that she was simply taking a breath.
"You must have known that her body had gone limp after your assault on her.
"Before you walked to the car park entrance you must have seen how she was - hanging half out of the car."'