Jamie Bain, 24, was jailed for life after killing Alex McKinnon, 32, and injuring the ex-boxing champion's brother-in-law.

Despite dropping his appeal against the conviction yesterday, he is expected to come back to court to challenge a judge's order that he must serve at least 22 years before he can apply for parole.

Bain was chased from the Marmion bar in Gracemount and was later found in a nearby garden with serious head injuries. He had been beaten up with his own gun.

During his trial it was claimed that brain damage he suffered had left him with no memory of the shooting in April 2006.

He had been expected to challenge his conviction on the grounds that judge Lord Uist had told the jury Bain was the main man when, it was claimed, there was no evidence in the circumstantial case to support this.

But at the Court of Criminal Appeal in Edinburgh yesterday, defence QC Mhairi Richards admitted that even if the grounds of appeal were right, it would not be enough to overturn the verdict.

No date has been fixed for Bain's appeal against sentence.