The reason is that the investigation is not yet complete. Among other things, not all analysis results and protocols have been compiled.
A man in his 40s has been in custody for just over three months. The man is suspected of probable cause for murder but denies any crime.
The 25-year-old woman disappeared from her home in Timrå on October 8 and was later found dead in a wooded area west of Kramfors. All parties in the case are prohibited from speaking in order to protect the confidentiality of the investigation, but police and prosecutors have confirmed that the woman and the arrested man knew each other from before.