The Map v. Ohio was about some police looking for a bomber and instead they found pormagraphy which is illegal.The police wanted to come in her house but she didnt want to let them in they then handcoff her and showed her a fake warrent.According to the fouth amendment you have the right to,be secure in there houses against unreasonable searches.The supreme court vote was 5-4 in favor of Mapp.The exclusionary rule is when a law that prohibits the use of illegaly obtained evidence in a criminal trail.A probable cause is a reasonable ground.An warrent is not necassary when you have a consent from the criminal or the person who they ivestigating,when the evidemce is in plain viw,protective sweep,car searches, exigent circumstances,inevestable discovery,and immediare control.That is the story about Mapp v. Ohio she was then found not guilty and won the case.