Does a petitioner have a right to have a witness in their favor protected by the Due Process Clause and the Fifth, Sixth, and Fourteenth Amendments?

QUESTION(S) PRESENTED (1). A Petitioner Rights to have a Witness in his favor is protected by the "Due Process of Law Clause" and the Fifth ,Sixth, Fourteenth, Amendment. See Washington v. Texas 388 U.S. 14 (1967). . (2) A Petitioner Right to have Newly Discover Evidence/New Evidence in his favor is Protected by the "Equal Protection of law" Fifth, Sixth, Fourteenth Amendment. See Griffin v. United States 336 U.S. 709 (1949). (3). When the government witness's, commit perjury, misconduct did they ‘fatally undermining confidence in the out come of petitioner trial ,deprived petitioner of a fair trial, and is the Petitioner entitle to New Trial. Which is protected by the " Due Process Clause" of the Fourteenth Amendment. See Alvarez v. United States, 808 F.Supp. 1066 ( S.D.N.Y. 1992), United States v. Biberfeld, 957 F.2d 98 (3rd Cir 1992). (2)