The trial of two people accused of being involved in the murder of a young mother more than 25 years ago is due to start today (May 1) in Christchurch.

In 1995 Angela Blackmoore, 21, was stabbed to death in her Wainoni home, while her two-year-old son slept nearby.

It became a cold case after decades with little progress until two people were arrested in late 2019.

In June 2020 Jeremy Powell was sentenced to a minimum of ten years in prison after pleading guilty to Blackmoore's murder.

Powell said the murder was organised by others, and that he was offered $10,000 for the killing.

David Hawken (Hāwea Flat) and Rebecca Wright-Meldrum are scheduled to appear in the High Court in Christchurch today on murder charges over Blackmoore's death.

Wright-Meldrum was arrested in October 2019, at the same time as Powell. Hawken was arrested in May 2020.

At Powell's sentencing, Justice Cameron Mander said Blackmoore's murder was a cold-blooded execution, which was planned and premeditated.

PHOTO: Supplied / NZ Police