[Norway] Bow & Arrow Killing.

[BIAD]

I see 3 arrows, and only ONE of them has any fletchings. None of them appear to have a broadhead.
The one at the letter box is very interesting - the attacker must have been an Olympic level archer, OR very lucky, OR it's a staged image
- he apparently managed to hit a crack in the clapboards so that the arrow could stick in, and he did that with NO fletchings on the arrow
to guide it aright into the crack in the clapboards.

ETA: It's possible that the second arrow in the two arrow image does have fletches, but that they are obscured by the leaves in the grass.
The point, on the right end of the arrow laying on the macadam surface, is clearly a field point, not a broadhead. Same for the arrow at the
letter box - there is no indication of blade entry into the wood, so no broadhead there, either.

From various media sites that reported the incident, the 'post-box' image seems to be official and I -a rookie regarding archery,
also found it odd that no 'fletchings' were on the end of the arrow. It's normal for a reader/viewer to accept the visuals displayed
as belonging to the article, but whether those two arrows laid on the grass and path are part of the tragedy, I cannot say.

But what you describe about hitting the crack and the lack of feathered-fins, is strange. I can't find any information on Brathen
in regards of archery lessons or as a hobby. But I found this odd stated in a BBC article:

'...Police prosecutor Ann Irén Svane Mathiassen told NRK that from what they could tell all those
 attacked were "completely random victims". She said the police believed the man went into
people's homes to kill them during the attack...'

There was a knife mentioned too.