1. Crime Scene Evidence: At the crime scene, investigators collected DNA evidence, including blood and other biological materials.

2. DNA Extraction and Analysis: The collected DNA samples underwent extraction and analysis in specialized laboratories.

3. DNA Profiling: DNA profiles were created from the crime scene evidence by analyzing specific genetic markers, such as short tandem repeats (STRs). DNA profiles provide a unique genetic "fingerprint" for each individual.

4. Database Comparison: The DNA profile obtained from the crime scene was compared to existing DNA profiles stored in law enforcement databases. These databases contain DNA profiles of known individuals, including convicted criminals and arrestees.

5. Partial Match: The DNA profile from the crime scene showed partial matches to the DNA profile of a previously convicted individual named Bryan Kohberger. This indicated a potential familial link.

6. Genealogy Research: To identify the potential suspect further, investigators used genetic genealogy techniques. They collaborated with genetic genealogists to search for relatives of the partial match and narrow down the suspect's identity.

7. Additional DNA Evidence: Investigators obtained a DNA sample from Bryan Kohberger's trash by conducting covert surveillance. This additional DNA evidence directly linked him to the crime scene.

8. Arrest and DNA Confirmation: Based on the strong DNA evidence, investigators arrested Bryan Kohberger in December 2022. Subsequent DNA testing confirmed that his DNA matched the DNA found at the crime scene, solidifying his identification as the suspect.

DNA profiling, in combination with other investigative methods such as genetic genealogy, played a critical role in identifying Bryan Kohberger as the suspect in the Idaho student killings.