Malcolm Rewa, pictured walking into the courtroom with the aid of a cane on day one of the trial. Photo / Michael Craig
A pathologist tasked with reviewing the original report of Susan Burdett's post-mortem examination agrees her injuries were akin to a car crash and were "rapidly fatal".
Burdett suffered "at least five separate blows to the head", Dr Simon Stables said today.
The doctor's answer came as he is giving evidence on day five of Malcolm Rewa's retrial for the murder of the 39-year-old accounts clerk in her Auckland home in 1992.
Rewa, a 65-year-old serial rapist, was convicted of Susan Burdett's rape in 1998 but two juries that year were unable to decide whether he was also responsible for her death.
Earlier today a member of the public sitting in the gallery sent a verbal barb in Rewa's direction as the man left courtroom.
A baseball bat, which Burdett kept as protection, was found lying next to her body on her blood-soaked bed.
"You can't get the exact weapon, all you can give is an opinion," Stables said.
But he added: "It would be consistent with a baseball bat being used, these injuries would be consistent with that."
However, earlier in the trial forensic scientist Dr SallyAnn Harbison said she could only detect "four tiny spots of blood" on the bat with the help of a microscope.
A test to establish if the blood was human came back inconclusive and Harbison said there was no forensic evidence which could directly link the bat to Burdett's killing.
Burdett, who weighed 62kg and stood 168cm tall, also showed "absolutely classic" signs of defence injuries to her hands as Stables surmised "she has tried to protect herself" from her attacker.
Dr Timothy Koelmeyer, who carried out the original examination, said Burdett's injuries were "rapidly fatal", a phrase Stables agreed with.
But trying to determine time of death, Stables said, was impossible to do with any degree of accuracy.
"Trying to determine time of death is really the last bastion of forensic pathology," he said.
The doctor said the wounds Burdett suffered also required "a significant amount of force".
"To fracture through the base of the skull requires a significant amount of force ... it is something that is usually seen in car accidents and you can imagine the force in that," he said.
He explained the human skull was thicker around the base.
Crown prosecutor Gareth Kayes alleges Rewa was Burdett's attacker.
He said earlier in the trial that Rewa entered Burdett's home on March 23, 1992, and raped and murdered her.
A stay of proceedings for a murder prosecution against Rewa was applied by the Solicitor-General in 1998, but two years ago the Deputy Solicitor-General reversed the stay thus allowing the current trial.
A stay had never before been lifted in New Zealand's legal history.