on a floor there are several 1-4 mm elongated drops leading away from a body lying in a pool of blood. the the forward wall there is a sigzag pattern and on the walls to the right side there is a linear patter

I'll try to have this make sense,

on the floor, 1-4 mm elongated drops away from body: perpatrator is walking away from victim.

zigzag pattern on walls: perp. is striking victim repeatedly.

walls 2 rt. side linear pattern indicates perp is moving weapon to remove blood from weapon. hope this is the answer your looking for.