It was on February 11 that a seriously injured man was found in an apartment in Åtdvidaberg.
His life could not be saved.
Two men are already in custody on suspicion of murder in the case.
Another person is now wanted in custody.
It is about a man in his 50s who lives in the Stockholm area.
He is wanted in custody for probable cause, the higher degree of suspicion, suspected of murder and attempted murder.
The attempted murder probably concerns the 58-year-old man who was written at the same address as the murdered man who was initially suspected of the crime.
According to a previous article, the prosecutor now believes that the 58-year-old is a crime victim.
The arrest hearing is taking place in the afternoon at Linköping District Court.