Harper & Associates is a highly-rated polygraph service in Miami, specializing in credibility assessment. Founded by Joseph W. Harper, a retired Metro-Dade County police detective with a BS in Criminal Justice from Florida International University, the firm boasts an expert witness in polygraph science recognized in both Federal and State courts. Harper & Associates is utilized by law enforcement and defense attorneys for truth and deception determination and is associated with The Florida Polygraph Association and The American Polygraph Association. They are operational daily from 8 AM to 9 PM, including Sundays.

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