Who is Ben Witherington III, PH.D from The Case for Christ and what is their importance?

Witherington is an expert on Jesus' claims and has written books including: Jesus the Sage; The Many Faces of the Christ; The Jesus Quest; Jesus, Paul and the End of the World; and Women in the Ministry of Jesus. He holds a master of divinity degree, and a doctorate in Theology with an emphasis on New Testament.