367 N.W.2d 715 STATE OF NEBRASKA, APPELLEE, v. DENNIS M. ROLF, APPELLANT. No. 84-795.Supreme Court of Nebraska. Filed May 10, 1985. Constitutional Law: Due Process: Blood, Breath, and Urine Tests: Trial. The due process clause of the fourteenth amendment does not require that law enforcement agencies preserve breath samples in order to introduce breath analysis […]