When Rahmanullah Lakanwal came to the U.S. from Afghanistan, he appeared lively and full of hope, but over the course of years, he slipped into isolation and was prone to taking cross-country drives without telling his family, according to a volunteer who worked closely with his family.

Lakanwal, an Afghan national, is accused of shooting two National Guard soldiers on Nov. 26. One of those soldiers, 20-year-old Sarah Beckstrom, died from her wounds. On Monday, West Virginia Gov. Patrick Morrisey described the other guard member, 24-year-old Andrew Wolfe, as in "serious" condition.

"My biggest concern was that [Lakanwal] would harm himself," the refugee resettlement volunteer told NPR. "I worried he would be suicidal because he was so withdrawn."

The volunteer spoke with NPR on condit

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