If someone had access to a spear, we'd know. But...maybe they cut her so many times so it would be harder to tell exactly what weapon was used. This is just speculation, but...one attack with a pitchfork would be obvious. But if they kept cutting up her body...

And Ukraine could have stood further away and got less blood on her. But on the other hand, she's the heaviest of the suspects, so climbing the wall might be harder for her.