Convicted wife killer Gerard Baden-Clay has turned to God behind bars and has had regular visits from a prison pastor, a leaked letter has revealed.

In the lead-up to his trial, Baden-Clay wrote a letter to friends that said he felt fortunate to have been introduced to a prison pastor.

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“He visits me regularly and has been helping me with general pastoral care as well as guiding my Bible study and faith journey,” the letter, leaked to the Sunday Mail said.

The Court of Appeal on Friday heard the former real estate agent’s appeal against his conviction for killing his wife Allison.

A judgment is expected within three months.