The high court in Napier has been shown CCTV footage of a murder-accused teenager riding around with a bloodied knife shortly after a homeless man was stabbed.
The Crown alleges 14-year-old Haami Hanara stabbed 40-year-old Kelly Donner four times over a dispute about a torch he borrowed from the victim.
The jury was also shown footage of Mr Hanara and four other teenagers throwing bottles, rocks and a bicycle at Mr Donner.
Detective James Forgie, who analysed the CCTV footage, told the court the footage was taken from a camera behind the Flax Bar and Eatery and also from a camera attached to the outside of the Flaxmere Library overlooking the back of the pub.
It showed five youths attacking Mr Donner with rocks and one throwing a bicycle at him.
He said the video then showed the accused coming out of a shadowed area at the back of the pub with a knife in his hand and following Mr Donner off-screen.
Thirty-three seconds later it showed him coming back into view of the CCTV camera with what Detective Forgie says is a "bloodied knife" in his hand.
Mr Hanara then picked up his bike that was thrown at Mr Donner and rides around.
"He's on the bike with the knife in his left hand," Detective Forgie told the court.
Mr Hanara's shoes also appeared to be bloodied, the court heard.
Earlier in the day, Institute of Environment Science and Research forensic scientist Janina Hopkins said an analysis of a black leather vest worn by Mr Hanara that night, later found at a Flaxmere address, had blood stains on it.
"There were numerous blood stains present on the inside and outside of the vest."
Giving evidence this morning, forensic pathologist Thambirajah Balanchandra said Mr Donner's suffered 14 cuts.
The carotid artery in his neck was completely severed and he bled to death, he said.
Without medical intervention Mr Donner would have only had between two to five minutes to live, he said.
The carotid artery was a major artery carrying blood from the heart to the brain and once it was severed Mr Donner's organs and brain would have suffered from the lack of blood and oxygen, Dr Balanchandra said.
Mr Donner also suffered a fractured rib, minor fractures to his eye socket and bruising or bleeding to his frontal lobe, as well as several lacerations to his scalp, he said.
Mr Donner's family wept as his wounds were described in court.
Under cross examination by the defendent's lawyer, Eric Forster, Dr Balanchandra said Mr Donner also had THC in his blood.
THC is the active ingredient most commonly associated with cannabis.
"Eighteen micrograms per litre of blood is consistent of smoking a single cannabis cigarette within two hours of death," Dr Balanchandra said.
Mr Donner also had two "superficial stab wounds" to his chest and shoulder, he said.
The trial continues tomorrow.