Any flaws in the prosecution of Emily Longley's murderous boyfriend were "minor and short and inconsequential", according to the three judges who rejected his appeal.
Lawyers for Elliot Turner asked the Court of Appeal in London for his conviction to be set aside by arguing that secret surveillance during the police investigation recorded conversations that should have been protected by legal privilege.
While the bugged conversations in question were not played to the jury who convicted Turner last May, Anthony Donne QC said that all the secret recordings were tainted as "fruit of the poisoned tree" as a result and should not have been given in evidence at the trial.
Two weeks ago, the three judges took just five minutes to consider their decision before dismissing the appeal.
The reasons for their dismissal were released in a written judgment overnight.
"Anything containing even a whisper of conversations protected by legal privilege was excluded" from the recordings used in the trial, said Lord Chief Justice Judge, Mr Justice Royce and Mr Justice Globe.