NEWPORT, R.I. (WPRI) — It was supposed to be a short walk for Donald Connell Jr. The 28-year-old left his father's Record Street home in December 1986 to head to his sister's house on Channing Street. But he never showed up. Initially, Connell's family thought nothing of it and assumed that his plans had changed. More than a week later, his father reported him missing. Donald Connell Sr. told investigators he hadn't seen or heard from his son in…