Police in Rogaland will therefore not pursue charges against the deceased man's 55-year-old friend who was held on remand.
Police opened an investigation of what they defined as a suspicious death after they received notification of the German man's death at 3.45am on Sunday.
The man and his two friends had come to a cottage on the island of Ombo, north of Stavanger, the day before. The three Germans had planned to go on a week-long fishing trip.
One of the man's companions was charged with severe bodily injury resulting in death and was scheduled to be transferred to police custody on Tuesday, while the second man had been released by police on Monday.
After the autopsy results and other findings of the police investigation, however, it was concluded that there was no criminal act behind the death, police said on Tuesday morning.
“That means there are no longer grounds for presenting the German 55-year-old for remand in Stavanger District Court today,” prosecuting attorney Erik W. Rand said in a police statement.