The short answer:
Nothing, and the last of the scrolls have been dated to approximately 68 AD, 35 years after the year ascribed to the Crucifixion.
The scrolls were discovered in 1948, and the Vatican, after a Church Father was put in charge of the translation, suppressed the publication of the Scrolls for many years.
So, what DO the Dead Sea Scrolls say about Jesus? Again: They don’t say anything about Jesus (or Christ).
Nevertheless, some scholars have sought to find evidence about early Christianity among the scrolls. For example, Robert Eisenman (The Dead Sea Scrolls and the First Christians) sees a possible reference to Jesus in the Damascus Document, and believes “Teacher of Righteousness” may have been James the Just.Read more: http://wiki.answers.com/Q/What_do_the_Dead_Sea_Scrolls_say_about_Jesus#ixzz1yu8E2sAQ
He (Professor Eisenman) never answered the faxes until one day his assistant called and everything was made crystal clear. There was no mention of Jesus in the Dead Sea Scrolls because Jesus as a living historical figure, in their theory, did not exist. They could not state that publicly because of the fear of an outcry, but that was the situation.”
What did Pope Leo X say about Jesus?
Pope Leo X (1513-1521
Some believe that he considered Jesus to be a mere legend. The Catholic Encyclopedia refers to a widely circulated remark:
“How much we and our family have profited by the legend of Christ, is sufficiently evident to all ages.” http://www.religioustolerance.org/chr_jcno.htm
Pope Paul III expressed similar sentiments, saying “there were no valid documents to demonstrate the existence of Christ.”
“Historically, it is quite doubtful whether Christ ever existed at all, and if He did we do not know anything about Him.“ –Bertrand Russell