4-5. "Because movant waived his right to have a hearing on any pretrial motions and the Magistrate Judge found that the movant's waiver was knowing and voluntary, he cannot claim that his constitutional rights were violated by the admission of his statements." Stolts v. United States, No. 4:09-CV-1195 CAS, 2010 WL 1257681, at *5 (E.D. Mo. Mar. 25, 2010) (citing United States v. Garrido, 995 F.2d 808, 814-15 (8th Cir. 1993)). Likewise, because Wyatt has not presented a valid, external cause for his failure to appeal the issues raised the instant motion, his claims must be dismissed, and I need not evaluate whether he was prejudiced by the alleged constitutional errors in his prosecution.