DNA evidence isn't limited to the police precinct. Wildlife officials analyze DNA to control the illegal trade of endangered species. Other researchers study DNA sequences to understand how individuals and groups—of both people and wildlife—may be related. We can even create a genetic "ID tag" for your pet, or detect genetically modified ingredients in food. Increasingly, the information gathered from DNA profiles is stored in databases, raising questions about who should have access to this information. Deciphering the sequence of all 3.2 billion units of the human genome was an astonishing accomplishment. In the year 2000, researchers announced they had pieced together our DNA code—a first draft of the human genome. These days, crime scene detectives look for fingerprints that are more than skin deep. The patterns they seek are "DNA fingerprints," or sequences in the genetic code that are unique to every person. But DNA evidence isn't limited to the police precinct. Prosecutors use DNA evidence to convict criminals, while defense lawyers use it to free the innocent. A flake of skin or a drop of saliva left at a crime scene has enough genetic material for a DNA fingerprint. Scientists studying the passage of genes from parent to offspring say they have uncovered the footprint of human migration throughout our distant past. How much is that doggie in the window? The price may depend on the pedigree, traceable through DNA analysis. From game poachers to importers, the illegal wildlife trade is a huge threat to animal populations around the world. Today, in an effort to reduce the pressures on wildlife, officials turn to DNA analysis to identify products made from endangered species.