The detention hearings were held at Växjö District Court on Friday afternoon.
The girl, who denies the crime, was detained on probable grounds suspected of murder, attempted murder, and serious weapons offenses, local media report.
The man, who also denies the criminal charges, was detained on probable grounds suspected of aiding and abetting murder and attempted murder. He is also suspected of serious drug offenses.
The two were arrested in absentia on Wednesday and were later apprehended in the Stockholm area.
It was around 7 pm on Monday when a 30-year-old woman was injured in a shooting in a multi-family house in the Teleborg district. She was taken to hospital, but her life could not be saved.
A 30-year-old man was also lightly injured.
According to the police, the man and woman had a relationship with each other. A neighbor has previously told TT that he had met them together on several occasions.
They were so nice, so pleasant, and so helpful. I have no idea how this could have happened to such fine people. For me, it was a shock, he said the day after the shooting.
