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LEE’S SUMMIT, Mo. — Jackson County prosecutors say that there will be no charges in the case of a Lee’s Summit infant who died in early May after being left in a vehicle while his mother went to work.

According to police, 13-month-old Heath Hubbard was found unresponsive in his mother’s vehicle near SW Wintercreek and SW Winterpark Drive on May 3rd. Police say that Hubbard’s mother noticed that the child was unresponsive, and immediately pulled over and called 911 for help.

Attempts by police and paramedics to save the child at the scene were unsuccessful.

Related: Lee’s Summit Baby Dies in Car

Lee’s Summit Police say that their investigation revealed that Hubbard was unintentionally left in a vehicle during the daytime hours as his mother went to work. Police say that the child’s mother mistakenly believed that she had dropped the child off at a daycare.

Police say that there was no sign of foul play, and called the child’s death a “tragic accident.”