A man who bashed to death a mother of three at Wellington's Basin Reserve cricket ground 15 years ago still does not understand what triggered the violent killing, the Parole Board says.
David William Taylor, 56, was last week declined parole after he appeared before the board late in April.
Taylor was sentenced to life in prison for the brutal killing of 41-year-old Marie Copley on June 20, 1997.
Taylor met Ms Copley in a Wellington city bar on the night of June 19.
But early on June 20, as they walked through the Basin Reserve, Taylor kicked, punched and bludgeoned her to death.