We don't have eyewitnesses telling us what they saw. What we have is anonymous authors giving their accounts on the basis of hearsay decades after..
PAUL also cannot be relied on as a before/after Witness for theres no real indication he knew Jesus before his post-ascention revelation.
Re:Matthew, Oddly such gospel is the only of the four that mentions the Roman guard at the tomb [appointed by Pontius Pilate himself.]. Such is no trivial detailed event considering he was paralyzed by God and later officially reported such incident. ...Yet the other Gospels place no significance on such.
-Bulletproof and Waterproof don't mean Idiotproof.