The police techniques says the bullet goes the same direction as the bloodstain and Olof turn his body 20 degrees to the right toward Lisbeth. I say the blood is blowing with the wind and the bullet goes straight and Olofs body points toward the road sign.

Important details:
It's windy 4 m/s, it means that the blood is going with the wind and changing direction on the bloodstain and the bullet is going straight. Bullet nr 1 hits the branch and change direction on the bullet.