“They used fire extinguishers filled with red paint to spray the walls and floor.
“They used crowbars and hammers to damage computer equipment and boxes of technical products, which they smashed apart.
“The fabric of the building was also damaged, not only the loading bay but also the security systems and even the disabled toilet,” she added.
Footage played in the opening address was said to show Zoe Rogers brandishing and swinging a sledgehammer in front of a security guard, Angelo Volante.
He also said he had been whipped by Charlotte Head and threatened with a saw by Leona Kamio.
Eventually he retreated – but later returned with the police. As he led officers into the factory, video played to the jury on Tuesday was said to show Ms Kamio raising her sledgehammer over her head and bringing it down towards him.
She was then tasered – but continued to resist arrest. The video is then said to show Samuel Corner approaching Sgt Evans and striking her back with a sledgehammer.
“Having hit her once, he raised the sledgehammer again and hit her with it a second time,” said Ms Heer.
“Fortunately, Sgt Evans was wearing a stab vest which may have absorbed the force of the impacts. Nevertheless she screamed in pain as she felt the force of the blows.
“She was immediately terrified that her spine had been damaged and when she tried, she was unable to get up.”
Sgt Evans suffered a fractured vertebrae and was unable to work for three months. Due to the ongoing impact of the injury, she has been confined to restricted duties.
The trial is expected to last until January.