In the case of the alleged murder of a six-year-old in Baden-Baden shortly before Christmas, the investigators have revealed new findings.
According to this, the father of a playground friend with whom the girl had stayed is said to have inflicted a severely bleeding cut on the child that quickly led to death.
In addition, he had sexually assaulted the victim, the public prosecutor said on Friday.
The girl may have been dead by then, a spokesman for the agency said.
The investigations were still ongoing.
An indictment is not yet available.
After the fact, the man set a fire in the apartment and accepted that his son and three roommates sleeping upstairs could be killed.
The thirty-three-year-old is said to have injured himself with cuts.
Prosecutors have accused the man of killing someone to satisfy his sex drive.
In addition, he is suspected of attempted cover-up murder in several cases, attempted serious arson and dangerous bodily harm.
The German has no criminal record, is in custody and is silent on the allegations.
The fire was discovered on the night of December 19 because of heavy smoke and was able to be extinguished before essential parts of the building caught fire, the public prosecutor said.
The emergency services discovered the girl's body in the bedroom.
The man was found with smoke inhalation in the back garden.
He was treated in intensive care.
According to the spokesman, the son's mother lives in another house.
The authorities assume that the six-year-old stayed with her boyfriend with her mother's consent.