An examination of actor Gene Hackman’s pacemaker after the discovery of his body this week suggested that he died on Feb. 17, the sheriff of Santa Fe County said in a news conference Friday.

Sheriff Adan Mendoza said that after Hackman, 95, and his wife, Betsy Arakawa, 65, were found dead in separate rooms of their New Mexico home, Hackman’s pacemaker was inspected and it showed that the “last event” occurred on that date, nine days before their bodies were discovered.

“According to the pathologist, I think that is a very good assumption that that was his last day of life,” the sheriff said. He added that both bodies tested negative for carbon monoxide.

Investigators combing through the secluded home outside Santa Fe, New Mexico, discovered common medication, medical records and a 2025 planner, according to a search warrant return released Friday.

The return, an inventory of items taken during a search of the home, specified that police had recovered thyroid medication, Tylenol and diltiazem, a drug often used to treat high blood pressure or chest pain.

It was not clear whether the medications listed were the pills that investigators had described as being scattered near Arakawa’s body. The sheriff did not give more details of what was in the monthly planner.

It could be months before clearer answers emerge about how the couple died. The unusual circumstances of their deaths have rocked Hollywood, as well as the cultural hub of Santa Fe and film lovers across the globe.

Mendoza said at the news conference that it could take three months or longer to get toxicology results that could clarify the cause of their deaths.

Hackman’s body was found on Wednesday in the mud room of his home, and the body of Arakawa was found in a bathroom near an open prescription bottle and scattered pills. One of the couple’s dogs, a German shepherd, was found dead in a nearby closet. Two other dogs were found alive on the property.

The drugs found at the house are used to treat common ailments. Diltiazem is a calcium channel blocker, which lowers blood pressure and can help with abnormal heart rhythms.