We have only a couple of references of Pontious Pilot and he was the governor of the entire area. Much of what would have been written down would have gone up in flames in 70 AD when Rome burn Jerusalem and much of Israel to the ground.
Prof. Daniel B. Wallace (wrote the textbook on ancient Greek & Greek translation) in an interview in the book "The Case for the Real Jesus" says "It's disturbing that when it comes to the Christian faith, people don't really want, or know how, to investigate the evidence" and when asked if the texts were accurately preserved enough to know God and his truth replied "Absolutely."
There are the writings of the early church, early extra Biblical references to Christianity and we do have that are all prior to the end of the 1st Century. Anyone with even the most basic understanding of historical evidence can easily see he existed and that the texts were written by the witnesses. It is up to that person to determine in their hearts if he is what he said he was (Son of God and Saviour) or other .... after looking at the number of early texts etc. I say he is what he said...
Jesus is the son of God and the Saviour (Messiah/Christ) as written about 700 years before Jesus was born in Isaiah,
Isaiah 53
5 But he was pierced for our transgressions,
he was crushed for our iniquities;
the punishment that brought us peace was upon him,
and by his wounds we are healed.
6 All of us like sheep have gone astray,
Each of us has turned to his own way;
But the LORD has caused the iniquity of us all
To fall on Him.
and in John 1
29The next day he saw Jesus coming to him and said, "Behold, the Lamb of God who takes away the sin of the world!
...
34"I myself have seen, and have testified that this is the Son of God."
Go study the evidence for yourself... C.S. Lewis, Alister McGrath, Lee Strobel, Anne Rice, Malcolm Muggridege etc. all were Atheists until they started to see if what the Bible said was true and then became proclaimers of Jesus the Messiah and God in the flesh!
What more do you want than the accounts of the witnesses as found in the Bible?
P.S. Both references to Jesus were found in the texts of Josephus that were found a few years ago. The extra Christian edit to the one quote was not there but both references still existed, and yet the myth that it was added later persists. I guess some prefer fiction to reality sometimes and don't want to see who Jesus was!