Police investigating the killing of an Auckland taxi driver have revealed they have found another item of clothing that may belong to the killer.

Hiren Mohini, 39, was stabbed by a passenger in what police describe as a frenzied attack about 1.30am on 31 January after picking up a fare from the city.

Police are still trying to identify a man seen in security camera footage shortly before the pick-up.

NEW EVIDENCE: Police have found a distinctive knitted dark cap with a large white logo outlined with three circles.  Read more... (147 words, 1 image, estimated 35 secs reading time)