Watson was originally charged with her murder but, despite recommendations from the coroner that the matter be tried before a jury, the charges were downgraded to manslaughter.

When Watson returns to the US, it is highly likely that he will be charged with his wife's murder.

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The Australian Government had been refusing to deport Watson until assurances were given by the US Government that Watson would not be sentenced to death should he be found guilty.

Last week, Immigration and Citizenship Minister Chris Bowen reported that those assurances had been received, thus clearing the way for Watson to leave the country.