"Mom! Guess what happened today," Patience demanded as we returned home from school the other day. "What's up?" I asked, panting more than a little, speed walking and jogging to keep up with her fast bike riding. "My friend Emma* in gym class is gone again. They said she had to move away for a while. Can you believe that? She's gone again!" Patience told me, confusion and sadness ringing in her words. I recalled the last time I had seen Emma. She and another girl were being silly with Patience and a few other kids at a school event a couple of months ago. My husband and I sat on the side and watched the children, noting Emma and another child in particular. "I don't mean to sound rude," my husband had said back then, with more than a little hesitation and concern edging his voice, "But I think something might be going on with two of those kids. I'm not sure. I can't tell. I don't know." And that's the thing. ...