David Fisher is a forensic biologist. He has worked on hundreds of homicide, sexual assault, and property crime cases and has testified in court and in the grand jury as a DNA expert on numerous occasions. Fisher is certified by the American Board of Criminalistics and is a Fellow in the American Academy of Forensic Sciences. Fisher also has much experience in mass fatality incidents. After the events of 9/11, he helped with the identifications of victims from the World Trade Center attack. As a member of the U.S. Department of Health and Human Services Disaster Mortuary Operational Response Team (DMORT), he was deployed to the Gulf region in 2005 to aid in the identification of victims from Hurricane Katrina. Fisher is also a co-author of the popular text, Forensics Demystified.