A Mother Whose Lapse Led to Child’s Death Seeks to Prevent Further Hot-Car Casualties

A Procter & Gamble scientist channels grief over the death of her 15-month-old daughter into a campaign to raise awareness

Ellen Byron

Updated May 3, 2018 9:43 a.m. ET

MASON, Ohio—Karen Osorio was alarmed when her husband called at the end of the day to say their 15-month-old daughter wasn’t at the day-care center when he went to pick her up.

Then she considered a horrifying possibility. She sprinted to the parking lot of her office at Procter & Gamble Co.

“That’s when I saw her, she was in the car,”...