Andrew Sandstrom piled the six kids – ages 7 and under – into the family minivan and dropped his wife off at work, then returned to their Moorhead apartment.
Four hours later, Sandstrom realized that the family's youngest, 5-month-old Christiana, was still in the van. He returned to the vehicle, removed the girl from her car seat, and brought her into the apartment, where efforts to revive her failed.
Police say Christiana died at the scene Tuesday night in what they believe is another case of a child left in a hot vehicle.
"We realize they are in heavy grieving right now," said Police Lt. Tory Jacobson, referring to 24-year-old Andrew and Shayna Sandstrom, 27, and the children they are raising at the apartment in the 1100 block of 19th Street S.
Jacobson said it's his department's obligation to investigate the circumstances leading to Christiana's death and forward their findings to prosecutors for possible charges in what the lieutenant views as "an accidental death" caused by the father simply forgetting he had left the baby behind in her car seat.
Jacobson said more details about Christiana's death, such as whether the windows were all the way up on the van at the time, would come out later.
Temperatures in the Moorhead area climbed into the low 80s by late afternoon and into the early evening, according to the National Weather Service. It was about 8:20 p.m. when Andrew Sandstrom called police.
"It's so tragic," Jacobson said, "even with windows that would be cracked open, clearly, we all know that a vehicle that isn't running with the air conditioning on," the temperature inside can climb sharply and quickly.
"Even in the shade," he added, "on a day that doesn't seem that hot, it gets deadly hot [in a vehicle], especially for an extended period of time."