The jury has been sequestered in the Michel Cadotte trial and it has only been given two choices - finding him guilty of second degree murder or guilty of manslaughter.
Cadotte, 57 is charged with second degree murder in the February 2017 death of his 60-year-old wife Jocelyne Lizotte who was in the late stages of Alzheimer's.
Quebec Superior Court Justice Hélène Di Salvo left no door open for a total acquittal.
Di Salvo told the jury of eight men and four women that if they believe Cadotte intended to kill Lizotte, they must find him guilty of second degree murder.
But she said if they have a reasonable doubt and don't believe Cadotte had the intent, they must find him guilty of the lesser charge of manslaughter.
Di Salvo spent the day carefully breaking down the testimony from the trial that began on January 17.
Di Salvo went over the testimony of expert psychiatrists and a psychologist who disagreed over whether Cadotte was suffering from major depression and if that pushed him over the edge.
The defence has argued that Cadotte was so depressed and so psychologically and physically exhausted from the constant care of his wife that he did not have the freedom to choose his actions. The defence said Cadotte's actions were the result of several factors that built up over nine years.
The crown has argued that Cadotte did have the intent to commit murder, from the minute he placed the pillow over Lizotte's face and smothered her.
Di Salvo reminded the jury that they have to determine Cadotte's state of mind at that very moment.
The jury will be sequestered until they reach a unanimous verdict.
"After 30 days, I believe that we are all tired, we are all exhausted," said one of Cadotte's lawyers, Elfriede Duclervil.
"Mr. Cadotte's fate lies in the hands of 12 of his peers."
Neither Cadotte nor the crown would comment.
The defence is represented by Duclervil and Nicholas Welt.
The crown is represented by Geneviève Langlois and Antonio Parapuf.