James Landry, 67, is accused of second-degree murder in the death of Philip Boudreau, a fisherman from Petit-de-Grat.
Landry was a deckhand on board the fishing boat the Twin Maggies when the 43-year-old Boudreau disappeared on June 1, 2013.
The Crown alleges Landry and other men on the Twin Maggies shot at Boudreau, rammed his boat and then dragged him out to sea.
Since the trial started earlier this month, the Crown has called 18 witnesses, including police, fishermen and Boudreau's family.
The jury has heard about the unsuccessful search for Boudreau — and the discovery of what are believed to be his boots and hat. They've also heard about the seizure of a rifle from the home of one of the other accused.
Last week, jurors and reporters saw Boudreau's boat that was found, battered and bullet ridden.
On Monday, the jury will hear from someone else who was on the Twin Maggies, fellow deckhand Craig Landry.
He was originally charged with second-degree murder, along with James Landry and the captain, Dwayne Samson.
The court has heard that Craig Landry assisted police in a re-enactment and the charges against him were later reduced to accessory after the fact.
Craig Landry is expected to provide the court with his version of what happened on the day Boudreau was last seen alive.