A "stubby-type" screwdriver found in the wreckage of a fatal plane crash last month may have caused the acciedent, investigators say.

A man who sent a malicious letter to the mother of the widow of slain Feilding farmer Scott Guy has been sentenced.

The man accused of murdering Feilding farmer Scott Guy has been remanded in custody until August 3.

A High Court jury in Whanganui has heard that the man accused of murdering sickness beneficiary Marice McGregor will take the stand, and that there is no blood or DNA evidence linking him to the crime.

A week ago Ewen Macdonald was a loving father, loyal husband, respected community man - and largely unknown.