He recently turned 18.

And although legally a man, Amon Kelleter looked very young as he entered a courtroom full of people -- some representing a young girl who couldn't be there herself.

Kelleter was formally charged Wednesday afternoon with first-degree murder in the death of a 17-year-old teen.

Woodstock RCMP responded to a call at a home around 4:20 p.m. Tuesday afternoon where they found an unresponsive girl

The Mounties arrested Kelleter at the home and held him in custody until his court appearance.

The judge ordered a publication ban on anything identifying the victim, but many people in the Woodstock area knew the victim and are feeling the loss.

She was in her last year at the local high school and had a promising future.

CTV News spoke to her mother outside the courthouse and, while she can't be identified, she did want people to know just how special her daughter was:

“She had a strong zest for life, every year that she was in high school she got certificates, she was either on the principal's list or the honour roll,” the girl's mother said. “She got her first job when she was 15, I believe. She worked hard every weekend, after school, kept her studies up, saved money, bought her first car, she took pride in everything she did. And everybody that was around her loved her. The community, everybody that knows her, is devastated, is absolutely devastated. They can't think about one bad thing to say about her.”

The RCMP did confirm Kelleter and the victim knew each other, but wouldn’t reveal the circumstances surrounding her death.

Kelleter remains in custody at least until his next court appearance, which is scheduled for Oct. 15 at Woodstock Provincial Court.

With files from CTV Atlantic’s Laura Brown.