1. Secure the crime scene and protect evidence from contamination.
2. Collect possible sources of DNA from the scene (e.g. blood, saliva, skin cells)
3. Select the appropriate collection materials and evidence sample containers.
4. Extract DNA from the scene (e.g. swabbing, scraping, cutting, or lifting)
5. Record all evidence and details related to the collection.
6. Analyze the evidence in a laboratory.
7. Store the evidence and DNA in a secure place.
8. Document all steps of the collection and preservation process.