We would expect a conspicuous amount of blood on the upper left part of the shirt, at least, though there could also be some blood on the pants high up, where the hip joins the thigh. Again, this is contrary to the evidence. There is little blood on the left side of the shirt, and the blood on the jeans is lower on the pants leg than this situation would cause. In Figure 5C, the victim is seated, but I leaning forward slightly. Falling blood only slightly stains the left side of the shirt in this posture, and that is only high up, near the collar.
Blood falls on the left thigh above the knee, but lower than the abdomen.
Part of what we see of the front of the jeans in Figure 2 is consistent with this posture, but there is also blood lower on the pants leg than we would expect from this posture. In Figure 5D, the victim is seated, but leaning so far forward, he is nearly bent double. This deposits the blood in the vicinity of the knee and below, and this is entirely consistent with the pattern seen in Figure 2. From this, I conclude that Goldman was seated, mostly straight legged, and leaning well forward all of the time, with an assailant behind who controlled and attacked him. For thoroughness, I have included Figure 5E of the victim lying on the ground.