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DNA

Forensic Biology can be broken down into two sub-disciplines, Body Fluid Identificationand DNA.  The Michigan State Police Forensic Science Division has six laboratories with Forensic Biology Units.  Body Fluid Identification may be conducted at laboratories located in Bridgeport, Grand Rapids, Grayling, Lansing, Northville, and Sterling Heights.  DNA analytical capabilities are located in laboratories at Lansing, Northville, and Grand Rapids.  Evidentiary items submitted to the Forensic Biology Unit are initially evaluated within the Body Fluid Identification sub-discipline.  Based upon a number of factors (type of crime, presence of a body fluid, suitability for DNA, investigative value, etc.), samples may be forwarded for further DNA testing. 

 

DNA Analysis

DNA testing is conducted on samples submitted by the Forensic Biology can be broken down into two sub-disciplines, Body Fluid Identification and DNA.  The Michigan State Police Forensic Science Division has six laboratories with Forensic Biology Units.  Body Fluid Identification may be conducted at laboratories located in Bridgeport, Grand Rapids, Grayling, Lansing, Northville, and Sterling Heights.  DNA analytical capabilities are located in laboratories at Lansing, Northville, and Grand Rapids.  Evidentiary items submitted to the Forensic Biology Unit are initially evaluated within the Body Fluid Identification sub-discipline.  Based upon a number of factors (type of crime, presence of a body fluid, suitability for DNA, investigative value, etc.), samples may be forwarded for further DNA testing.

If DNA samples from potential donors are available at the time of testing, comparisons are made to DNA profiles from the evidentiary samples.  If a DNA match is declared, the probability of selecting an unrelated individual at random from the population with the same profile is generally measured in terms greater than one in a quadrillion.  DNA profiles from evidentiary samples may be entered into a DNA database (COmbined  DNA Index System) if certain eligibility requirements are met.  Subsequent searches may assist in associating an individual to a crime or linking crimes together.