Data gathered from an Apple Watch has been presented as evidence in a recent murder trial in Australia.

Myrna Nilsson, the victim of an alleged home invasion, was wearing an Apple watch at the time she was killed in her Adelaide home in September of 2016.

The victim’s daughter-in-law, Caroline Nilsson, claimed that her mother-in-law had been followed home by a group of men that day. After 20 minutes of fighting, the men, according to the daughter in-law’s account, left the daughter-in-law bound and gagged in the home. Although she insists she hadn’t heard the fatal attack on her mother-in-law, Nilsson managed to free herself moments after the men had left the house around 10 p.m.

However, her mother-in-law’s Apple Watch tells a different story.

"The evidence from the Apple Watch is a foundational piece of evidence for demonstrating the falsity of the defendant's account to police," said prosecutor Carmen Matteo.

"A watch of this type…contains sensors capable of tracking the movement and rate of movement of the person wearing it...it also measures the heart rate."

According to the prosecution, the recorded data on the watch was compatible with a person in shock or who had lost consciousness.

"The deceased must have been attacked at around 6:38 pm and had certainly died by 6:45 pm," she said.

"If that evidence is accepted, it tends to contradict the accused's version of an argument occurring between the deceased and these men outside the laundry for a period of up to 20 minutes. Her emergence from the house was well after 10:00 pm and if the Apple Watch evidence is accepted, that is over three hours after the attack on the deceased."

With suggestions that she had staged the attack on her mother-in-law, Caroline Nilsson was denied bail based on the "apparent strength of the prosecution's case." The trial is expected to continue in June.