One of the three men found guilty of killing Lukas Strasser-Hird has asked the Alberta Court of Appeal to overturn his conviction, arguing the jury's verdict was "unreasonable."

Assmar Shlah was found guilty of second-degree murder, along with Franz Cabrera, less than a week ago.

Joch Pouk was convicted of manslaughter, while Jordan Liao was acquitted.

After the Crown closed its case, all defence lawyers argued for a directed verdict, meaning the judge would tell jurors they must acquit or find the accused — who were each charged with second-degree murder — guilty of lesser offences.

The trial judge erred in dismissing the directed verdict application and the verdict rendered by the jury was unreasonable and not be supported by the evidence, argued Shlah's lawyers Balfour Der and Jillian Williamson in their notice of appeal.

Lukas Strasser-Hird died in November 2013 after he was assaulted outside a downtown bar, police said. (Facebook)

Strasser-Hird was swarmed, beaten and stabbed outside a Calgary nightclub in November 2013.

A fifth man, Nathan Gervais, was also charged with first-degree murder, but disappeared weeks before the trial began while on bail. He remains at large.

After the verdicts were read, Shlah buried his face in his hands and appeared to be crying.

Der said at the time that he did not have words to express his disappointment with the verdict.

"I have no clue how these people could actually come to this verdict," he said. "He's devastated. The boy's sitting there crying, saying he never touched the guy."

Shlah's lawyers Jillian Williamson and Balfour Der speaking to the media after the jury convicted their client, Assmar Shlah, of 2nd-degree murder. (Meghan Grant/CBC)

Strasser-Hird's DNA was found on Shlah's shoes but Der said it wasn't in a pattern consistent with kicking or stomping the victim.

But prosecutor Ken McCaffrey told the jury that the witness who testified Shlah punched Strasser-Hird while he was on the ground, should be believed.

It was Shlah, according to McCaffrey, who was responsible for instigating the first fight.

The Crown called more than 80 witnesses over the six week trial. The other two men who were found guilty have not yet filed appeals.

A sentencing date will be set on Aug. 5.