Forensic testing at the scene of a Dunedin death - has produced 'extremely strong' links to the murder-accused

Rajinder is accused of stabbing 27-year-old Gurjit Singh in January last year.

He was found outside his Liberton home, after friends became worried he'd stopped responding to messages.

The ODT reports defence co-counsel Katy Barker argues DNA can never definitively identify one person.

But forensic scientist Kate Stevenson told the court blood in the victim's home was 500-thousand million times more likely to belong to Rajinder - than a random other New Zealander.

A verdict's expected this week.