Huckle is 30 years old and had attended the Harvey Grammar School in Folkestone, where he was pictured celebrating his A-level results in 2003.
Clifford Knights-Kennedy, a father-of-three from Folkestone who went to school with Huckle, said: “From what I remember of him he was always a bit of a loner. He never hung out with anyone and didn’t try to include himself within the school.
“I don’t remember him actually having any friends at the Harvey at all and at the time just thought he was a weird, quiet kid.
“I can’t quite get my head around what he has done. To spend five years at the school with someone and then find out they did this is bewildering.”
Meanwhile as a teenager he attended the Ashford Baptist Church in Station Road.
The Rev Robert Sylvester said that he was a “peripheral” member of the church who was never in a position to take Sunday schools or lead any child activities.
Mr Sylvester said: “He was quiet, shy and retiring and not terribly comfortable socially, so he was difficult to chat to.
“He was very much on the fringes and never at the heart of things.
“People who knew him said they tried to make the effort to welcome him. So for those who remember who he was, this news has been dreadfully shocking.”
He added that child safeguarding policies were in place at the time and said: “I can say hand on heart say that children here were not at risk during the period he was with us.”