Fox news is saying that the county sheriff has indicated that Hackman's pacemaker registered a "cardiac event" about 9 days before his body was discovered.
Since everyone else is speculating, I'll give it a go...
Hackman has a heart attack and dies. I mean, rare and completely out of the norm for someone who's 95 and has a pacemaker, but rarer things have happened.
Wife scenario 1:
She discovers his body and goes into the bathroom where she overdoses. The only problem with that is that a pill overdose takes time. Generally a lot of time to take effect. Most people who OD on pills aren't found on the bathroom floor. They're found in bed.
Of course, she could have chewed the pills, or she could have broken out a supply of the super potent fentanyl that he was muleing into the United States on a regular basis because she's oriental...
Wife scenario 2:
She discovers her husband not feeling well and possibly in a medical emergency. She goes to the bathroom to retrieve his medication. Her stress levels are off the map and she suffers either a heart attack or a stroke, dying there in the bathroom surrounded by the pills that she was trying to get.
According to the sheriff's office, "Arakawa, 65, was found lying on the bathroom floor with a space heater and an open bottle of prescription medication nearby with pills “scattered on the counter-top,” per an affidavit for the search warrant obtained by NBC News Feb. 27. The medications taken from the home were an unspecified thyroid medication, the painkiller Tylenol and the blood pressure medication Diltiazem, according to the outlet."
Of course, given her connections to the Oriental fentanyl trade, all of those were cut with incredible amounts of fentanyl, so...
Wife scenario 3:
Hackman and his wife knew too much about the Clintons. A Russian hit squad infiltrated their compound to flood the house with fentanyl gas. But, they forgot their gas cylinders back in Russia (Ivan was too drunk to check the official inventory) so they snuck into the house and dropped a pill on the space heater. Given the purity of the fentanyl that the wife was muleing in from the Orient, everyone died. Which is what Hillary Clinton intended. No loose ends. The bodies of the Russian hit squad will never be found.
Wife scenario 4:
yee naaldlooshii. She disrespected a Navajo elder. And that can't be overlooked.