A third person has been charged with the murder of Christchurch woman Angela Blackmoore in August 1995.
A man and a woman in their 40s were charged with murder in connection to Blackmoore's death last October.
Blackmoore was 21-years-old and 10 weeks pregnant when she was stabbed 39 times in the kitchen-dining area of her home in the east Christchurch suburb of Wainoni on 17 August, 1995.
The man has since pleaded guilty to murder and is awaiting sentence.
Detective Sergeant Todd Hamilton said today detectives arrested a 47-year-old man and charged him with murder.
He is due to appear in Queenstown District Court tomorrow.