Or they were trying to get out of house???I’m not an expert. But from the picture it seems like the person bleeding was trying to go in the house, had grabbed a handful of plants on their way to the door, stopped at the door to unlock/open it - that’s why the splatter is concentrated in one spot (as the person stopped and possibly had to remove other hand holding back the bleed or something) and also why the green plants were dropped near the door.