Officials summoned a volunteer diver from the Jonesboro Fire Department, who found the car about 175 feet off the boat ramp

I call B.S. on this being an accident. Nobody takes a minivan 175 feet into the water unless you're doing 90 mph and launch that vehicle as hard as you can in a direction certain to bring your doom. Perhaps it's a really crass thing to say, as the death is made more tragic because one woman was pregnant. Add up the previous lost-in-the-woods episode with the stupidly ridiculous idea that they called for help but didn't have the awareness to roll down the f-ing window or open the door. Also, the article glosses over this, but

a warden picked them up and brought them to their vehicle, which was parked at the park.But Stiner then drove toward the boat ramp instead of in the other direction toward Machias, Smith said.

So the unsaid thing here is that apparently the warden told them where to drive and the women drove the complete opposite direction at (apparently) full speed down a dead end road in the thickest pea soup fog of your nightmares.

Okay, maybe the electrical system went out the moment they impacted the water or perhaps before they came to their senses. Yes, I know they'd have to wait for the car to fill with water before opening the door, but it's not like these were 2 ten year old kids. These mom-types of 37 and 38 years old with a f-ing minivan and probably a purse full of stuff and a van full of something hard enough to crack a window. A minivan. With large cavernous interior that would take a little extra time filling with water compared to a compact.

"They called on the phone that they were in the water and the car was filling up. Then the phone went dead,"

I'd be interested in hearing the 911 call.
"Yes, hello, our car is filling with water. We're going to drown. Help."
"Open the door."
"What?"
"Have you tried the door?"
"We thought we'd just sit here until help arrives."