416 N.W.2d 249 STATE OF NEBRASKA, APPELLEE, v. WILLIS L. WARREN, APPELLANT. No. 87-096.Supreme Court of Nebraska. Filed December 11, 1987. Motions to Suppress: Waiver. Neb. Rev. Stat 29-115 (Reissue 1985) requires that any objection as to the voluntariness of a statement of a defendant in a criminal case be made as a pretrial motion […]