GATINEAU, Que. — A judge is expected to instruct a jury today now that lawyers have finished their submissions in the court martial of a Canadian Forces captain.

Robert Semrau is charged with second-degree murder in the death of an Afghan insurgent in 2008.

Semrau's four-month trial heard he allegedly fired two rounds from his rifle into the dying enemy fighter, perhaps in an act of mercy.

Major Steve Turner, Semrau's lawyer, told the four-member military jury that the prosecution failed to prove its case beyond a reasonable doubt.

But the prosecutor, Lieutenant-Colonel Mario Leveillee, argued there was no doubt Semrau fired the fatal two rounds.

He said the evidence of other witnesses shows the captain also made a number of self-incriminating statements.