Forensic scientist describes evidence to the court

A forensic scientist has described to the High Court at Whanganui the details of DNA evidence left at the murder scene of Craig Rippon.

Tyrone Peter Madams, Matthew Thomas Madams, Kevin Roy Madams, and two youths are charged with the murder of Mr Rippon, 57, and with participating in a criminal organisation on November 8. They have denied the charges.

Glenys Knight is a senior forensic scientist at the Institute of Environment Science. She told the court that blood could be found throughout the Rimu St property where Mr Rippon was found.

Blood was found around the broken windows of the property and what appeared to be blood coming from a cut artery.

Two crowbars, two metal pipes and blood from inside a Nissan Terrano were examined.

Mrs Knight said the blood was tested and "likely" belonged to Tyrone Peter Madams, Tyrone William Madams and one of the youths.

No DNA from Mr Rippon was found.

Mrs Knight told the court that Mr Rippon's injuries were likely not to produce much blood.

She noted it was possible the large amounts of blood from the defendants could "drown out" other smaller traces of DNA evidence.

The trial began on October 27 and continues tomorrow. It is expected to last four weeks.

In June, Tyrone William Madams pleaded guilty to Mr Rippon's murder and was sentenced to life imprisonment.