The enumeration in the Constitution, of certain rights, shall not be construed to deny or disparage others retained by the people.

So, even if the 4th Amendment didn't enumerate an individual citizen's right to privacy, or the 2nd Amendment didn't protect the individual citizen's right to keep and bear arms, THE NINTH AMENDMENT DOES.
 

AMENDMENT X to the Constitution of the United States:

    The powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people.

NOwhere in the Constitution is any police power or jurisdiction over criminal law other than that regarding treason and counterfeiting given to the federal government.
 

Freedom  Keys a collection of amusing, fascinating, insightful, or maybe even useful information

ALWAYS Remember: Without the 9th and 10th Amendments, many states would have refused to ratify the constitution or even to join the union.