In March, a 17-year-old girl disappeared in Mark Municipality. Four days later, she was found dead near her school.
The police now say that they initially searched for her nearly 30 miles away because they traced the wrong phone.
The internal investigation by the police shows that they made two mistakes in searching for the girl, reports P4 Sjuhärad. In addition to tracing the wrong number, they also failed to take into account the vulnerability caused by the girl's disability.
In September, the Borås District Court established that the girl was killed by a then 17-year-old boy, but they have yet to determine whether he intended to kill or if it was a case of negligence.
The defendant, who has since turned 18, is now undergoing a forensic psychiatric examination, and the main trial will continue in October after the forensic psychiatric report has been submitted to the court.