Request services to submit evidence to our lab, supplemental forms, expedited forensic analysis. Our lab supervisor or director makes the final decision.Perform a variety of specialized forensic scientific examinations and analysis to identify and characterize physical evidence gathered in law enforcement work. The Conviction Integrity Unit (CIU) of the Hennepin County Attorney's Office works to investigate criminal convictions within Hennepin County. Since halting DNA analysis, the forensic scientists reviewed over 50,000 samples from previously conducted casework to narrow down the impact.