What is the U. S. Supreme Court's definition of probable cause? For practical purposes, when does probable cause exist?

U. S. Supreme Court's definition of probable cause when the facts and situations are within the officer's knowledge. The knowledge is reasonably trustworthy and are sufficient to make believe that a crime has been committed and certain property is connected with the crime. Probable cause must exist for a law enforcement officer to make an arrest without warrant or search without warrant or seize the property.