The disappearance of Saskatoon woman happened the same day she told her husband their marriage was over, a Crown prosecutor told a court room Monday.

The first-degree murder trial of David Woods, 51, began Monday in Saskatoon Court of Queen’s Bench. He is accused in the November 2011 disappearance and death of his wife Dorothy Woods.

Dorothy Woods was last seen Nov. 11, 2011, but her body was not discovered until almost two months later in a culvert near Blackstrap Lake, south of Saskatoon, after a GPS tracking device placed on David Woods' car led police to her body.

Court heard Dorothy Woods had been unfaithful to her husband and he was aware of this at least one month before her disappearance.

Three witnesses testified Monday including two police officers who searched the Woods' home after responding to a call about Dorothy's well-being. One officer said David Woods seemed "depressed" but had "no real concern" about Dorothy's whereabouts.

Dorothy's brother, Lawrence Carter, also testified. He said his sister had mentioned her marriage was "on the rocks" more than once. He said he finally convinced David Woods to file a missing persons’ report two days after Dorothy was last seen.

One agreed fact is that Dorothy Woods died from ligature strangulation with blunt force trauma being a contributing factor.

The trial is being heard by a jury and is scheduled to run for the next four weeks.