Sixth grade student Adler Jean-Charles speaks to reporters in Madison, Wisconsin, on December 16.
Mandatory Credit:	WISC via CNN Newsource

Sixth grade student Adler Jean-Charles speaks to reporters in Madison, Wisconsin, on December 16.
Mandatory Credit: WISC via CNN Newsource

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What we know about the Madison, Wisconsin, school shooting that left a student and teacher dead

Police are investigating why a teenage girl brought a handgun to a small Christian school in Madison, Wisconsin and opened fire, fatally shooting a student and a teacher and wounding several others — casting the tight-knit religious community into mourning just days before the school was set to close for Christmas.