Lester Holt

For Bob, a new research lab.

For Autumn, a chance to head her own department.

But still something was gnawing at her, a kind of emotional vacuum.

She wanted to have another child.

By now in her early 40s, she was taking fertility treatments, hormone injections, but nothing was happening.

Was it really eating away at her?

That she wasn't getting pregnant?

Time was going by.

Looking back, her mom Lois recognized some worrisome signs, changes in her daughter.

Then, in early 2013, the couple tried a new approach to the baby problem.

A fertility doctor thought the bodybuilding supplement known as creatine just might help Autumn get pregnant.

As it turned out, her husband Bob had been using the stuff in his research.

So on April 17th, Autumn Klein seemed ready to give creatine a try.

She texted her husband that day, I ovulate tomorrow.

He answered, perfect timing, creatine, smiley face.

These are hospital security camera pictures that show Autumn throughout the day and leaving work late that night.

Ten minutes later, she was home.

And minutes after that, her husband, Bob Verante, was on the phone to 911.

His wife slumped on the kitchen floor, gasping for breath.

The dispatcher asked the husband what he was seeing.