In the case Rochin v. California (1952), the Supreme Court ruled that the suspect could not be tried because he was accused by unconstitutional means.
Suspecting under a clue that Rochin had illegal morphine capsules, the Los Angeles police entered in Rochin's house, went to his room and found him with his wife and a pair of capsules on the "night stand", which by the time the police broke in, he immediately took both the capsules and swallowed them.
The police arrested him and with no interrogatory, took him direct to an hospital, using various cruel means to make him expel the capsules through vomiting.
Although they found morphine- containing capsules on his stomach and they wanted to charge him on drug dealing for that, the court decided that those capsules could not be used as proof given the way the proof was taken. The cruel methods used to take away and the way Rochin was unlawfully "imprisoned the hospital violated the Due Process Clause of the Fourteenth Amendment that states:
"[N]or shall any State deprive any person of life, liberty, or property, without due process of law".
Along with it, the court condemned the way the police obtained the evidence:
" (...)we are compelled to conclude that the proceedings by which this conviction was obtained do more than offend some fastidious squeamishness or private sentimentalism about combating crime too energetically. This is conduct that shocks the conscience. Illegally breaking into the privacy of the petitioner, the struggle to open his mouth and remove what was there, the forcible extraction of his stomach's contents -- this course of proceeding by agents of government to obtain evidence is bound to offend even hardened sensibilities.(..)convictions cannot be brought about by methods that offend "a sense of justice."