Howard Brennan's eventual identification after his "change of heart".
Handwriting on Klein's order coupon and PO box form and partial palm print that showed up at the FBI a week later on a card.
Limousine bullet fragments matched to rifle
Expended cartridge shells matched to rifle
Large brown paper bag with Oswald's prints
Palm print and fingerprint in sniper's nest
The ballistics implicate a weapon, not a person. It cannot be proven that the large paper bag was the one Frazier saw or that Oswald carried it into the building or that it was in the sniper's nest when it was first discovered or that it ever contained a rifle. And prints on boxes in the building are not remarkable because he worked there and would be expected to handle boxes.
So we're left with an inconsistent identification from a witness who was influenced by television and newspaper reports, a questionable reappearing partial print, and unscientific and biased analysis of two block letters on a photo of a microfilm copy of a two-inch order coupon.
What exactly is it that you find "overwhelming"? That he left his wedding ring behind?