“Everything everybody seems to know, we didn’t know,” James Snead said. “It’s as simple as that.”

Cruz still lived with the Sneads on Wednesday when he walked into Marjory Stoneman Douglas High School with an AR-15 rifle and killed 17 people — the worst school shooting since Sandy Hook.

The Sneads’ son had asked whether his friend could move into their home last Thanksgiving. Cruz’s mother, who had adopted him, died of pneumonia Nov. 1, leaving him without parents. He stayed briefly with a family friend in the Lantana area but wanted to move on.