(NewsNation) — On Wednesday, the jury in the double-homicide trial of South Carolina lawyer Alex Murdaugh saw one of the state’s most important pieces of evidence — a video from his 22-year-old son Paul’s phone taken just minutes before the prosecution says he was killed.

Murdaugh is currently standing trial on two counts of murder in the shooting deaths of his wife and son at their Colleton County home and hunting lodge on June 7, 2021. Maggie, 52, was shot several times with a rifle, while Paul, 22, was shot twice with a shotgun near kennels on the property.

The video from Paul’s phone from just before 9 p.m. that day shows him in the kennels on the family’s Moselle hunting lodge, trying to get a video of a dog’s tail.

“You hear three different voices in the video. You can tell because they’re so different,” South Carolina Law Enforcement Division cellphone data analyst Britt Dove said.

Prosecutors argue one of those voices is Alex Murdaugh’s, which places him at the scene with both his son and wife moments before they were killed.

Alex Murdaugh told investigators he’d fallen asleep inside the main house yards away, and hadn’t seen his wife and son until he found their bodies.

On Wednesday, the jury also heard a detailed analysis of data from Alex, Paul and Maggie Murdaugh’s cellphones.

During the previous day’s court proceedings, Dove also went over information from Maggie Murdaugh’s cellphone.

Dove told prosecutors on Tuesday about a flurry of activity starting at 8:49 p.m. on Maggie Murdaugh’s phone, on which the orientation changed from portrait to landscape and back several times, and the camera turned on for one second. According to The Associated Press, Maggie Murdaugh’s health app recorded 59 steps, but the activity ended at 9:06 p.m.

“It’s just a remarkable record of some of the activity that was occurring,” former FBI agent Dennis Franks told NewsNation.

The fact that the app recorded steps after Maggie Murdaugh was killed raises questions for former FBI agent Tracy Walder.

“Who had it in their possession? And how did it end up where it ended up?” Walder asked. “Was Alex Murdaugh’s phone tracked into that area?”

However, attorney Brian Claypool said on “NewsNation Live” that he doesn’t think the technology on the phone will be able to answer who had it last.

That will have to be determined with a fingerprint analysis of the phone, he said.

“I don’t think you’re ever going to get a definitive answer,” Claypool said.

Criminal defense attorney April Preyar said she doesn’t think the cellphone data will be sufficient to prove Murdaugh’s guilt, especially with all of the other evidence that has come out through previous testimony.

“I think that there’s still enough there for the defense to push back and to say, ‘How can you trust these officers? They didn’t do a thorough investigation,'” Preyar said. “The cellphone data isn’t enough. We don’t know that Alex was there at that time. He could have seen his wife and son and still left to go see his mom like he said he did.”

On Tuesday, a state agent insisted he heard a possible confession from Alex Murdaugh, although defense attorneys argued against this assertion.

South Carolina Law Enforcement Division Senior Special Agent Jeff Croft testified he was “100% confident,” Murdaugh said, “I did him so bad” as he sobbed and spoke to state agents during an interview three days after his wife and son were killed. The defense, however, said Alex Murdaugh had said “They did him so bad.”

Alex Murdaugh faces 30 years to life in prison if convicted.

The Associated Press contributed to this report.