An Adelaide female allegedly bludgeoned her mother-in-law to loss of life then explained to police they had been the victims of a violent residence invasion, a court docket has read.

Caroline Dela Rose Nilsson, 29, is on trial in the South Australian Supreme Courtroom charged with the murder of Myrna Nilsson, 57, at the residence they shared at Valley Perspective, north of Adelaide, on September 30, 2016.

Opening her scenario on Tuesday, prosecutor Emily Telfer SC said, on that night time, neighbours discovered Caroline Nilsson “moaning and groaning” exterior the residence about 10pm.

Police discovered the system of Myrna Nilsson on the laundry place floor and declared her lifeless at the scene, while the a few younger youngsters of Caroline and her partner, Myrna’s son Mark, were also in the residence.

Jurors read Caroline Nilsson explained to police two or a few adult males with “loud and angry voices” arrived at the residence with Myrna Nilsson when she returned residence from work previously that night time.

She allegedly explained to police that, through the residence invasion, the adult males had assaulted her and tied her up with speaker wire and tape, before they ransacked the house.

“It’s the prosecution scenario that the story about other adult males remaining there is a fabrication which has been conceived and recurring by Caroline Nilsson to go over the point that she killed her mother-in-law in the laundry of the house that they shared,” Ms Telfer explained to the jury.

Ms Telfer said information gathered from an Apple watch worn by Myrna Nilsson will display a “flurry of activity” recorded about 6.30 that night time.

“After that flurry, all motion stops,” she said.

“On the prosecution scenario, this is a file of Myrna Nilsson preventing for her existence in an attack.”

The court docket read that the attack will have to have occurred quickly soon after Myrna Nilsson arrived residence, since the bluetooth in her auto disconnected 47 seconds previously.

Ms Telfer said fewer than an hour afterwards, at seven.08pm, information gathered from Caroline Nilsson’s cellphone confirmed she opened the eBay app soon after her partner texted her about acquiring resources.

Mr Nilsson had been at his work as a stability guard on the night time of his mother’s loss of life.

The court docket read traces of the drug tramadol were located in hair samples taken from the older two youngsters, then aged five and a few, almost two months soon after Myrna Nilsson’s loss of life.

Ms Telfer said the drug can be employed as a sedative and “reduce emotional reactivity”.

“Consumption of tramadol could possibly reveal how the youngsters were stored asleep or at minimum reassured around this a few hour interval that the gatherings took spot,” she said.

Caroline Nilsson has pleaded not guilty to the cost.

Heath Barklay SC, for Nilsson, said it was not disputed that Myrna Nilsson “met a incredibly violent and sad end”.

“She was crushed to loss of life in her laundry – there is no question about that,” he said.

“There is no dispute about the timing at which she arrived residence.”

Mr Barklay said it was also agreed that Caroline Nilsson was located out the front of her house “bound, gagged and hysterical”.

“The situation … is regardless of whether she certain and gagged herself and went out and put on that functionality – that‘s the prosecution scenario,” he said.

“The defence scenario is that it was no functionality. It was genuine.”

Mr Barklay said it would be argued that Caroline Nilsson did not sedate her youngsters and did not attack their grandmother.

The defence position is that Caroline Nilsson did not kill her mother-in-law.

The trial carries on before Justice Chris Bleby.

At first published as Apple watch information ‘fight for life’