Gravel sniper pad
Evidence Corroborated Circumstantial Official copy physical
Bagley and the Information: elbow/knee/foot impressions in Losee roof gravel, a prone pad with a clear corridor to Kirk's seat. No spent casings on that roof when Bagley first looked.
A pad is geometry, not an ID. Video of a figure crawling to that corner is the ID fight. The pad plus a clear shooting corridor is what alternate-shooter claims have to move or duplicate.