does the piss ghost leave piss trails, and if so are there any connected to pea's room

Do the stab wounds match up with the bits of glass?

You pick up the bloody shard of glass laying next to The Thinker. You try stabbing it into some of the wounds and it seems to match up.

does the piss ghost leave piss trails, and if so are there any connected to pea's room

You don't know if the piss ghost leaves piss trails. You check for piss trails connected to Pea's bedroom and find none.

is the blood spatter from the thinker wide and far, as if he still had a beating heart, or shorter and nearer as if he was already dead

is the blood spatter from the thinker wide and far, as if he still had a beating heart, or shorter and nearer as if he was already dead

The spilled blood is mostly just around The Thinker. There isn't any on the walls. If you had to guess you'd assume the stabbings were done while he was still alive.