Technology has changed many aspects of the criminal justice system, and the use of DNA evidence represents one of the best examples of how technology has altered the criminal justice landscape.
Investigators can collect DNA evidence from a number of different sources. Almost any biological evidence can contain DNA
Because of its accuracy, criminal lawyers increasingly rely on DNA evidence to prove a defendant’s guilt or innocence.
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Where Can DNA Be Found at a Crime Scene?
Since a person's DNA is located throughout his entire body, any materials left from his body at a crime scene will contain his DNA. Some examples of bodily materials that contain DNA evidence include:
• Blood
• Saliva
• Perspiration
• Hair
• Teeth
• Mucus
• Fingernails
• Semen http://criminal.lawyers.com/crim ... investigations.html