MEDIA, Pa.—A suburban Philadelphia woman charged in the death of a 2-year-old boy in her care has changed her story about the day the toddler died.

Twenty-four-year-old Heather Hess is on trial for third-degree murder and involuntary manslaughter in the December 2011 death of David Miller Jr.

Hess initially told police that the boy choked on a bottle cap.

The Delaware County Daily Times (http://bit.ly/ZCBhyI) says Hess testified Thursday she was swinging David around in a circle, playing "airplane." She says David flew out of her hands and hit a wall.

She says he cried but then seemed fine. Hours later she found David unresponsive, and he died in a hospital the next day.

Hess says she made up the bottle cap story because she didn't want to get in trouble.

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Information from: Delaware County Daily Times, http://www.delcotimes.com