"First, we want to hear from anyone who noticed a man in the Moire Park area that night that may have been acting suspiciously or wearing muddy clothing.
"Secondly we would like to remind everyone out walking alone to take extra care and remain aware of their surroundings."
Anyone with information that can assist Waitemata Police with this investigation should contact Police on 105 and quote file number 191026/6803.
Information can also be passed on anonymously via Crimestoppers on 0800 555 111.