DES MOINES, Iowa (AP) — Ahmir Jolliff dashed out of his home in Perry Thursday morning, eager to see his friends on the first day back to school after winter break.

It was vintage Ahmir — known as “Smiley†around his house — an 11-year-old whirlwind of cheerful activity. He kept a trunk of toys unlocked in the front yard so anyone could play with them, his mother said. He loved soccer, played the tuba and sang in choir. He had a habit of touching people on their shoulder and asking them how their day was.

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