A Davidson County jury found a Nashville man guilty of three counts of rape of a child and one count of aggravated sexual battery Friday evening.
William Arnold was mentoring a boy through the Big Brothers Big Sisters program.
He had mentored the boy for a couple of years.
According to officials, the molestation started when the boy was 10-years-old, and took place when Arnold and the boy were alone inside Arnold's vehicle and home.
When the boy told his mother what happened, she reported it to police.
The trial began Monday and the jury announced it's verdict Friday.