. >> reporter: roman roberson had two classes with william. he said today was a normal day until the principal made an announcement. >> first block, ms. davidson came on the announcer and said they found a body, and it matches william mcquain. and everyone was crying. it was a tough day. >> reporter: roberson's mom picked him up after school instead of letting him ride the bus, knowing he would be upset. >> we had noticed that he had been absent for a couple of weeks, you know, the day they issued the amber alert. and he was very upset that day. and we've just been hoping that he would be found alive. >> reporter: she says the mother's murder has been difficult to explain now that william's been found dead, it's impossible. >> we've just prayed a lot. it's just hard. it feels like a piece of innocence lost, you know. they shouldn't have to deal with this. >> reporter: other parents came to take their kids out of school after they heard the news. >> i came to the school. i wanted to be with my kids. and it's just heartbreaking, devastating. >>