The pupil was placed in a special school on the basis of a psychological test carried out a year and a half before the decision was taken, local newspaper Kristianstadsbladet reports.
Last year, when he joined an independent special school, an examination was conducted which showed that he was not suffering from any mental disability.
The Swedish National Agency for School Inspection (Skolinspektionen) has now criticized the local municipality for not carrying out any form of educational, medical or social examination before the child began special school.
The pupil's possibilities for attending a regular school while receiving some form of support were not examined either.
"We understand that the basis was, to say the least, thin. An error has occurred here that has seriously affected the pupil's life," Staffan Opitz at the agency told the newspaper.
When it became clear that the pupil was not suffering from any mental disability he started to attend a regular school. He passed the national tests with acceptable grades and was accepted into a high school in the autumn of 2008.