Mrs. Short was killed some time during the evening of
October 18 or early morning of October 19, 2008. The appellant
testified that he found his wife’s body in their backyard at
about 1:30 a.m., when he returned home after attending a
local hockey game and visiting various bars. According to the
appellant, he had left the house just after 7:00 p.m. on the
evening of October 18. He testified that his wife was alive
when he left.
 The autopsy revealed that Mrs. Short had died from blows
to the head. A 4” x 4” board with Mrs. Short’s blood on it was
found near her body. The authorities did not establish a time
of death. Mrs. Short had last been seen by her neighbours
at about 6:00 p.m.
 The appellant testified that when he came upon his wife’s
body in the backyard, he smelled a strong odour of gas. Her body
was near the family gas tank at the back of the property. The
first responders also smelled gas and noticed that the gas cap
was beside the tank.
 The police came to suspect the appellant for various reasons. He was arrested on October 24, 2008.
 The appellant and Mrs. Short had been married for
28 years. There was a lot of evidence that the marriage was not
a happy one. The appellant habitually verbally and emotionally
abused and belittled Mrs. Short. He was controlling, arrogant
and volatile. There was no evidence of physical abuse.
 It was the Crown’s position that by the spring of 2008,
Mrs. Short had finally decided that she had had enough of the
appellant. She began to take steps to gain her independence
from the appellant. These steps included obtaining her driver’s
licence, looking for a job outside of the home and seeking the
advice of a divorce lawyer.
 The Crown maintained that during the summer of 2008,
the appellant became aware that Mrs. Short was no longer prepared to tolerate his abuse and submit to his control. He knew
that she was taking steps to leave him. Specifically, he knew
that Mrs. Short had hired a lawyer and that she was having an
affair with another man. On the Crown’s theory, the appellant
became very angry at the thought of having to provide financial
compensation to Mrs. Short as part of any divorce. He decided to
murder her rather than pay her.
 In support of its position, the Crown led evidence of
— the nature of the relationship between the appellant and
Mrs. Short, especially from the summer of 2008 to her death