Thrown Equipment at Ball

[TussAgee11]

Line drive to right field gets into the gap. I'm in A, cut in to see the touch of first, and then try to go find the ball. I see the glove rolling around on the ground and the fielder chasing the ball with no glove on. Its clear he threw it.

Runner gets to third, I call time to go talk to PU. He says "I saw him throw it, but i'm not sure if it contacted the ball or not. I really can't say either way".

I can make a case for either awarding home (3 bases from time of contact out there, runner was past 1st) because the RF was stupid and threw his glove and made me have to make a tough call OR I can see that neither of us saw the glove touch the ball, or not touch the ball, and without evidence either way, nothing should be called (kind of like indisputable evidence).

Thoughts?