Police believe they have come face-to-face with Scott Guy's killer - and they expect to charge that person with murder.

One of two teenagers charged with attempted murder after a policeman was attacked with a machete at Taihape on December 11 last year has pleaded guilty.

Anonymous tipsters responding to an appeal for information on a vandalism attack have given police new leads on the murder of Feilding farmer Scott Guy and police have reiterated that information will be treated in confidence.

Going public today with images of graffiti found on murdered Manawatu farmer Scott Guy's house has led to a number of calls to police.

Police investigating the murder of farmer Scott Guy are pursuing a new lead linked to a vandalism attack on his Feilding property.

The widow of Feilding farmer Scott Guy, whose murder remains unsolved five months on, has issued a heartfelt plea for her husband's killer to come forward as the family faces its first Christmas without a husband and dad.