The Regina man on trial in the death of an 18-month-old boy wept in court Monday as he listened to the 911 call received before the boy died.

Jason Will, 25, has pleaded not guilty to manslaughter in the death of Raime Myers.

Will was arrested three years ago after his fiancée's son was found badly injured and died in hospital.

In the 911 call played in a Regina courtroom, court heard Ramie's mother frantically telling operators the child wasn't breathing.

While the tape played, Will was hunched in the courtroom over a notebook wiping away tears.

Later in the day, forensic officer Jason Williams testified he counted 53 bruises on the toddler's body.

Paramedics told the court some of the bruising could have come from trying to revive the boy, but that wouldn't explain the bruises on the top of his head or on his genitals.

Paramedics also noticed a pattern of "fingertip" like bruises on the side of the boy's chest.

Among those in court Monday was Raime's great-grandmother Betty Sproule. Outside court, she said she trusts the evidence will lead to Will's conviction.

The trial continues Tuesday.