The Crown had claimed Beckett murdered his wife to profit from an inheritance, insurance and their house.
Beckett denied the charge. Following several months of hearings in 2015 related to admissibility of evidence, his trial started in Kamloops last January and included his claims that Ms Letts-Beckett had been suicidally depressed and either committed suicide or drowned accidentally.
The trial ended after three months, with the jury unable to reach verdicts, and Beckett was ordered to undergo a new trial.
Raised in Hastings, Beckett was running a business taking tour groups from Napier to Cape Kidnappers when he became a Napier councillor in 1998.
He served a three-year term but he did not stand for re-election and moved to Canada, where he married the then Ms Betts, whom he reportedly met while operating the tours.
The trial will commence at 10am BC time with the jury selection and trial scheduled to follow.