Data from actor Gene Hackman’s pacemaker shows he was likely dead for nine days before he and his wife were found dead at their New Mexico home, authorities said.

The pacemaker shows Hackman’s “last event” was recorded on February 17, Santa Fe County Sheriff Adan Mendoza said at a Friday news conference. “According to the pathologist, I think that is a very good assumption, that that was his last day of life,” the sheriff said.

Hackman and his wife, along with their dog, were found dead this week in circumstances officials deemed “suspicious enough” to warrant thorough investigation.

As authorities investigate their deaths, several items have been taken from the couple’s home.

Two green cellular devices were removed, along with three medicines: a thyroid medication, Diltiazem – used to treat high blood pressure or chest pain – and Tylenol, according to the inventory released Friday as part of a search warrant affidavit in Santa Fe County court.

Also seized by sheriff’s deputies were records from MyQuest – a medical diagnostics service – and a 2025 monthly planner, it says.

The causes of death of Hackman, 95, and Betsy Arakawa are not known. The pair did not show any external trauma, and there were no immediate signs of foul play, according to preliminary autopsies and officials. There were also no immediate signs of a carbon monoxide or natural gas leak, authorities said.

Both Hackman and his wife tested negative for carbon monoxide, likely ruling it out as a potential cause of death, Mendoza said Friday.

The couple’s bodies were found in separate rooms in their secluded house, with scattered pills found next to Arakawa, according to the sheriff’s office. Investigators have not yet determined whether Hackman and Arakawa died at the same time, Santa Fe County Sheriff Adan Mendoza told NBC’s “Today Show” on Friday morning, but they both likely had been dead for some time before they were discovered.

“It appears (to be) several days, possibly even up to a couple of weeks,” Mendoza said. And narrowing down exactly when could be a challenge, experts told CNN.

Investigators are working to piece a timeline together by analyzing a planner found at the home and cell phone data, including phone calls, text messages, events and photos. They’ll also be interviewing maintenance workers, family members and security at the couple’s gated community.

“We’re doing a reverse timeline,” Mendoza said Friday. “We’re doing a timeline from the time of death and the autopsy and the results, and we’re going to start working our way backwards.”

Hackman was an Oscar-winning actor known for his roles in films such as “The French Connection,” “Hoosiers, “Unforgiven” and “The Firm.” Arakawa, three decades Hackman’s junior, was a classical pianist.

Here is what we know about their deaths.

911 caller saw Hackman and Arakawa lying on the floor through window

Hackman’s and Arakawa’s bodies were discovered by maintenance workers at the home just before 2 p.m. local time Wednesday, the sheriff’s office affidavit for a search warrant obtained by CNN affiliate KOAT states.

A caller told 911 they could see two unconscious people through a window but could not enter the home, according to the call obtained by CNN.

“No, dude, they’re not moving. Just send somebody out here really quick,” the caller said.

Police responded to the call and discovered Arakawa’s body on the ground inside a bathroom next to an orange prescription pill bottle with scattered pills on the floor, the affidavit says.

The pills are “important evidence” for the pathologists and the medical examiner to consider as they try to make a determination about the cause and manner of death, according to Mendoza.

The body “showed obvious signs of death, body decomposition, bloating in her face and mummification (sic) in both hands and feet,” the affidavit states. Mummification usually starts over two weeks after a person dies, Santa Fe Fire Chief Brian Moya said.

Hackman’s body was then found on the ground near the kitchen in a similar condition, with a walking cane and sunglasses next to the body. The deputy suspected he had suddenly fallen, the affidavit says. Mendoza, the sheriff, later said there was no indication that either of them had suffered injuries from a fall.

A German shepherd dog was also found dead in the bathroom. The dog was in a crate, police have clarified; the affidavit says the dog was in a closet. Two healthy dogs were found on the property.