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A cross erected at the Waimakariri River in remembrance of teenager Marie Davis who was raped, killed and dumped in the river - Source: ONE News -
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Scientific evidence of blood spots found in Marie Davis' bedroom and the study at her home was presented to the 12th day of the trial of the man accused of her rape and murder.
Dean Stewart Cameron, a 39-year-old road worker, denies the charges in a four-week trial before Justice Lester Chisholm and a jury in the High Court at Christchurch.
Environmental Science and Research forensic scientist Gary Gillespie told of examining several of the scenes associated with the Papanui 15-year-old's disappearance in April last year.
Her body was recovered from the Waimakariri River 11 days later.
Gillespie did a visual and luminol examination to detect blood spots at her Morrison Avenue house, where she disappeared from on April 6.
Two blood spots were found on the wooden floor of her bedroom and samples were sent for DNA analysis.
In the study where the computer was located - the crown says Marie was apparently listening to music on the computer that night - bloodstains were found on the wooden floor, and on the arm and back of the armchair.
These were also sent for DNA analysis.
No semen was detected, he says.
Luminol testing showed two more areas of blood staining on the study floor.
Testing on Cameron's car led to hair samples being taken for testing. Gillespie says none of these hair samples matched the reference hairs from Marie contained in her medical examination kit. No blood or semen was found inside the vehicle.
He detailed swabs taken from Marie's body. He said low levels of semen were detected in swabs taken from her vagina and vulva. These and scrapings from beneath her fingernails were sent for DNA analysis.
He described pieces of rope obtained from the Waimakariri and pieces taken from the Veitches Road address where Cameron lived.
Some of the rope was different and came from another source. The remaining rope items and disposable gloves were sent for testing.
One sample sent for examination was a length of yellow rope. One end had a knot within which there were pieces of disposable gloves.
The trial is continuing.
