ENOCH, Utah — City leaders in a small Utah town choked up this week as they expressed shock after a murder-suicide carried out by a fellow church member left eight people dead in their close-knit community, including five children who were classmates with their kids. Though shocking, family mass killings are an all-too-common tragedy across the country. Enoch, Utah, is one of more than 30 communities sent reeling by a family mass killing in the last two years, a list that includes communities of wealth and poverty and spares no race or class.