Police are still working to learn what led to Wednesday's shooting at Annunciation Catholic School in Minneapolis, MN. Investigators are combing through documents and other material left behind by the killer. They say the main theme is hate.

The shooting left 18, mostly children, injured and two dead.

Eight-year-old Fletcher Merkel's father shared how friends and family will remember his son. "Fletcher loved his family, friends, fishing, cooking, and any sport that he was allowed to play," said Jesse Merkel.

The family of Harper Moyski is also grieving and released a statement. "Harper was a bright, joyful, and deeply loved ten-year-old whose laughter, kindness, and spirit touched everyone who knew her," it read in part. "No family should ever have to endure this kind of pain."

Investi

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