Baldev Singh Kalsi is accused of the July 13 attack on his wife, Narider Kaur Kalsi.
She died Sunday, shortly after her family agreed to have her removed from life support.
The charge against the 66-year-old man was upgraded from attempted murder on Monday.
Baldev Kalsi was the president of the Gurdwara Sahib Brookside Sikh Temple in Surrey until he was charged last week and members voted to remove him from his position.
Kalsi remains in custody awaiting his next court date.
Also on HuffPost