Further DNA analysis is expected to dominate day seven of Phillip Polkinghorne's murder trial

The Auckland eye doctor is accused of murdering his wife, Pauline Hanna, in 2021.

The defence maintains that Hanna took her own life.

The Crown's DNA expert told the court Hanna's neck had DNA from both herself, Polkinghorne, and a much smaller amount, possibly from a third person.

Yesterday's events centred around blood in the bedroom and urine on the dressing gown Hanna wore at the time of her death.

More DNA and forensic evidence from the scene is expected today.