Michael Taylor described three areas of intense blood staining on the floor of the room.
One towards the north-west corner of the room appeared to be associated with blood spatter on the nearby wall and items on the floor, Dr Taylor said.
The other main areas of staining were close to the suitcase lid where Sophie's head and shoulders were lying and on the carpet beneath one arm.
"In my opinion, these findings support the view a number of blows where struck while the deceased was on the floor near the corner of the room . . . and she was then dragged to the suitcase where it is possible more blows were inflicted," Dr Taylor said.
The 22-year-old Honours student was killed at her Ravensbourne home on January 9 last year. She was stabbed or cut 216 times with a knife and scissors while she was in her bedroom packing to go to Wellington and a job with Treasury.
The Crown says Weatherston, a 33-year-old former University of Otago economics tutor, murdered Miss Elliott with a knife he brought with him from his flat to kill Miss Elliott.
Some of those marks were not clear in photographs taken of the scene but when the stains were enhanced with the chemical luminol and photographed, there was clear evidence of thin lines extending from near the items in the corner to the suitcase where the body was lying.
He described Miss Elliott's body lying on the open suitcase, her head resting on the carpet beyond the open suitcase lid, her legs on the floor on the other side of the case.
She had many very severe injuries.
A black-handled pair of scissors, blood stained and slightly bent, lay on the floor between her legs.
The blood-stained blade of a knife was inside the main part of suitcase.
And a black knife handle, also bloodstained, was later found on the open flap of the suitcase beneath where Miss Elliott's shoulders had been resting.
The blade and the handle looked like they could be part of the same knife, Dr Taylor said.
He also found several bloody footprints on the bedroom carpet while other marks looked more like hand marks, one made by an open hand, another by a closed hand or fist.
There was also another open hand print which seemed to be pointing towards the door.
The inference from the footprints was that there had been movement in the room, that the prints were made after the bloodshed, Dr Taylor said.
Two patterned blood stain marks close to a chair in the north-west corner of the room appeared to have been made by a bloodied hand.
And there were also bloodied hand marks on the duvet cover on the bed and on the side of the door.
Blood spattering right across wall to the door and onto the edge of the door, indicated the door was opened, at least for some of the time when the blood was spattered.
Sophie's mother, Lesley Elliott, told the court last week she managed to get the door unlocked at one point and she saw Weatherston straddling her daughter and stabbing her.
Earlier, the court heard a knife block in Clayton Weatherston's flat had one knife missing.
Detective Graeme Smaill of Dunedin searched Weatherston's Warrender St flat the day after 22-year-old Honours student Sophie Elliott was killed at her Ravensbourne home on January 9 last year.
Det Smaill told Justice Judith Potter and the jury he found a knife block containing five black-handled Wiltshire knives on the kitchen bench beside the gas hob in the kitchen of Wearherston's flat. But the knife from the sixth space in the block was missing.
All the knives were different, ranging from large to small.
The knife recovered from Miss Elliott's bedroom appeared to be in the middle of the size range as there were two or three larger knives still in the block, Det Smaill told defence counsel Greg King.
From comparisons made, he was confident the knife from Miss Elliott's bedroom was the knife missing from the knife block in Weatherston's flat.
The officer was giving evidence on the 9th day of Weatherston's trial for the murder of Miss Elliott.
Weatherston denies murder although he admits the manslaughter of the young woman. The defence say he was provoked into losing self control but the Crown say the number and pattern of the wounds indicate a controlled and focused attack.
