A road-rage murder trial has been aborted after two days when a juror realised they knew information about the case which meant they should not be serving.

Shayd Robinson, 20, is charged with murdering father-of-two Aaron Hadfield following a confrontation in the Lower Hutt suburb of Stokes Valley in January.

On Wednesday in the High Court at Wellington Justice Ron Young dismissed the jury after one of them realised they should not have been there because they knew information about the case, Fairfax reports.

The jury was already down to 11 people after another juror left on Monday.

Earlier, witnesses said they saw a frenzy of punching from two men through the driver's window of Mr Hadfield's car, Robinson licking a small knife and then saying "I like the taste of your blood".

Robinson will be kept in custody until another trial date is set.

NZ Newswire

More News From Around NZ

Aucklander Mike Heard has completed 430 bungy jumps off Auckland Harbour Bridge to shatter the world record for most jumps in a 24-hour period.

Auditor-General Martin Matthews has been stood down because of the way he handled the fraud case involving Joanne Harrison in his former role.

All Whites goalkeeper Glen Moss says he can't wait for the side's clashes against world-class opposition like Portugal in next month's Confederations Cup.