Danielle Oylear has urged the driver believed to be involved in the death of her partner Rutger Hale last year to clear their conscience.
Ms Oylear, who is from Alaska and lives in Hawea, still ''strongly'' believes she saw the mystery object which crashed through the couple's windscreen and killed Mr Hale, come off the back of an oncoming white utility vehicle.
The driver's identity remains unknown.
''A clear conscience is always a better option in my opinion and I would ... ask for some honesty if there is any sort of information that's being held back about that day,'' Ms Oylear said after yesterday's inquest into Mr Hale's death.
''I've always said I'd be compassionate if this was an accident and I know that sometimes we can react without really thinking when we're under pressure or something scary has happened and maybe not make the best decision.''
Ms Oylear said the inquest was ''enlightening'' as it provided some new information - including some ''pretty significant'' evidence a car did a U-turn at the scene - and affirmed her belief the object was man-made, meaning someone else was involved.
However, conflicting evidence had given her much to consider.
''It was such a quick moment that I don't know how much I should trust my gut feeling anymore ... I want to be open to whatever's really going to put this last puzzle piece together.
''It has almost kind of made me acknowledge more what a mystery this is. We've got all these experts in there that still are baffled by what has happened.''
While there were oversights in some areas of the investigation, such as not keeping the car windscreen for the Defence Technology Agency to examine, police had put in a ''full effort'', she said.
''It's comforting to know that everyone has rallied so hard for us and worked so hard to try and come up with a resolution.
"But, obviously, it's going to be a little disappointing when we still don't know.
''It's hard enough to lose your partner in an accident but it's impossible when you can't ever understand why.''
But Mr Hale would ''want me to gather myself together and keep going'', she said.
Mr Hale's mother, Lisa Miller, of Auckland, was grateful for the hard work police had put in to the investigation and said there were ''no answers to be had''.
