The defence has wrapped up its case in the court martial for a Calgary reservist accused of manslaughter in the death of another soldier on a training field in Afghanistan in 2010.

Major Darryl Watts is charged with manslaughter, negligent performance of a military duty, unlawfully causing bodily harm, and breach of duty.

Major Watts held the rank of Captain and was the Officer in Charge of Practice on February 12, 2010 when a range training incident killed Corporal Joshua Baker, 24, and injured Bombadier Dan Scott, Sergeant Michael Mark McKay, Master Corporal William Pylypow and Corporal Wolfgang Brettner.

Watts took the stand on Monday and gave his version of what happened that day.

He admits that he was in charge of the platoon but not of the training exercise that killed Corporal Baker.

Watts told the court that he had never been qualified to run a firing range and had even gone up the chain of command to let others know that fact.

The prosecution called 23 witnesses in the trial and made it clear that Major Watts had the authority to either move the soldiers further away or call down the training exercise all together.

The defence argued that he was not trained on the Claymore devices and that Warrant Officer Paul Ravensdale had been trusted to execute the training that day.

Warrant Officer (now retired) Paul Ravensdale also faces the same charges and another soldier, Capt. (then Maj.) Lunney pleaded guilty to negligent performance of a military duty in relation to the same incident at a court martial on September 13, 2012.

Closing arguments will begin on Wednesday.