Every time Jennifer Tidd's son was secluded or restrained at school, she received a letter from his teachers. Her son has autism and behavioral issues, and over three years — from 2013 to 2016 — Tidd got 437 of those letters.
"I see this pile of documents that's 5 inches tall that represents hundreds of hours of being locked into a room, and I feel, you know, horrible," Tidd says.
She's sitting in her living room in Northern Virginia, her head hanging over the stack of papers. Tears are in her eyes.