Lester Holt

Eventually, Autumn went into cardiac arrest.

Doctors managed to bring her back barely.

They actually took turns doing chest compressions to try to get some reaction from her, to try to get her heart moving and pumping again.

Another doctor reviewed Autumn's symptoms and ordered up a test.

He wanted a toxicology screen of her blood.

hours passed.

Her blood was being pumped into a machine that was doing the oxygenating work of her heart and lungs.

At some point, word had reached her cousin Sharon, now living in Washington State.

Sharon talked by phone to Autumn's frantic husband, Bob, and was grateful for his medical background.

Eventually, though, Autumn lost brain function.

By the time her parents finally made it to the hospital, they could see there was little hope for their daughter.

Sharon wanted desperately to fly out from Washington State to see Autumn, but her Aunt Lois told her to wait.

Doctors managed to keep Autumn alive for two full days.

At some point, Sharon could tell that Autumn's grieving husband had run out of hope.

But in the ER suite, everyone knew it was.

Autumn's little girl was brought to her bedside.

On the third day after she'd been wheeled into the ER, Autumn's exhausted colleagues pronounced her dead and turned off the machines keeping her alive.

Auden's husband and family now had funeral plans to make and even darker days to get through.

But one person wasn't done with the mysterious case of Auden Klein.

His work was just getting started.