Police investigating the homicide of Robert Nelson are appealing for help from the public for sightings of a vehicle and driver.

Robert was killed in Melville on July 8.

Detective Inspector Graham Pitkethley says police would like to hear from anyone who has seen the vehicle pictured or recognises the man in the blue hoodie.

"The vehicle pictured is believed to be a red Mazda Atenza and we would like to find the owner of this vehicle.

"The licence plate on the vehicle pictured belongs to a black ute believe to have been stolen from Papakura on or around 6 July."

The image above was taken from a service station on Cavendish Drive, Manukau on 18 July.

Police would like to hear from anyone who recognises the vehicle or the person at the petrol pump.

Information can be shared with Waikato Police on 07 858 6339 or anonymously via Crimestoppers on 0800 555 111.