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Mr Lowe disappeared from his Portsmouth Dr workplace about 10am on Friday.
His black BMW car was found by a member of the public in the Catlins Conservation Park area on Tuesday morning and since then police and volunteers have been searching the area.
Senior Sergeant Cynthia Fairley said today LandSAR was again searching in the Catlins area, around Mclean Falls, with up to 20 volunteers.
Police were still appealing for information from anyone who may have seen Mr Lowe, particularly the occupants of a small red car that was parked at Mclean Falls at 11am on Saturday, September 16th.
This may have been a local vehicle or could have belonged to a tourist that had walked to the McLean Falls that day.
We ask that they contact us on 021 191 4831.