Forensic scientist paints picture of how Angela Blackmoore's murder unfolded

The forensic scientist who took blood samples from the scene of Angela Blackmoore's murder 28 years ago has painted a picture of how the attack happened.

However, under cross-examination, the Defence has challenged the Crown's series of events.

The forensic scientist used blood splatters from the scene of Blackmoore's murder to help reveal what happened on the night of August 17, 1995.

"Ms Blackmoore has likely received some of her injuries, including cuts to her head while she was seated. And this was shown from her clothing with the blood on the front of her sweatshirt," said forensic scientist Peter Cropp.

Cropp gave evidence describing how Blackmoore fell against a door and slid down to the floor, where she would have been attacked further.

"A number of forceful blows were inflicted down onto her upper body with a narrow item."

The Crown alleges David Peter Hawken ordered the hit on Blackmoore and co-accused Rebecca Wright-Meldrum used her friendship to help Blackmoore's killer, Jeremy Powell, get into the house.

In opening statements on Tuesday, prosecutors made a claim about what happened after she was killed.

"After Ms Blackmoore had been killed, Rebecca Wright-Meldrum cleaned down some surfaces and then the pair then left."

Under cross-examination on Thursday, those series of events were challenged by her lawyer Philip Shamy.

"Some scenes it becomes obvious that there has been attempts to clean up."

"Did you see any attempts here?"

"No," Cropp replied. 

Hawken's former business secretary, who didn't want to be filmed, told the court she saw him the day of the murder and that he was agitated.

She called Hawken in the hours after she found out about Blackmoore's death.

"I just had this horrible sick feeling that he had done something," the former business secretary said. 

Defence counsel argues it was reasonable for Hawken to be agitated and stressed at the time because he was going through financial trouble, had a baby on the way and a death in the family.

But the call went unanswered so she tried again later in the next morning.

"I said, 'David, where were you yesterday? Where were you?' And he said, 'Get off the f***ing phone'."

More associates of the accused are expected to give evidence on Friday.