John Marshall Harlan II,
Spencer v. Texas — Opinion of the Court
“ Petitioners do not even appear to be arguing that the Constitution is infringed if a jury is told of a defendant's prior crimes. The rules concerning evidence of prior offenses are complex, and vary from jurisdiction to jurisdiction, but they can be summarized broadly. Because such evidence is generally recognized to have potentiality for prejudice, it is usually excluded except when it is particularly probative in showing such things as intent. ”
