🕯️ Notes from the casefile
How Familial DNA Solved the Golden State Killer Case
- What: The Golden State Killer was apprehended in 2018 through familial DNA matching after evading capture for decades.
- Where: California
- When: Mid-1970s to mid-1980s
The Golden State Killer, a name that haunted California for decades, was finally apprehended in 2018. His reign of terror spanned from the mid-1970s to the mid-1980s, leaving a trail of unsolved murders and rapes.
But how was this notorious criminal caught after so many years? The breakthrough came through a method that was both innovative and controversial: familial DNA matching.
Law enforcement turned to genealogy databases, where countless individuals had uploaded their DNA for ancestry tracking. By comparing the DNA collected from crime scenes to these databases, investigators found a match — not directly to the killer, but to his relatives.
This led them to Joseph James DeAngelo, a former police officer. His familial connections provided the key to unlocking years of mystery, showcasing the power of modern technology in solving cold cases.
While this method raised ethical questions about privacy and consent, it undeniably changed the course of criminal investigations. The capture of the Golden State Killer serves as a stark reminder of how science can intersect with justice.
Did You Know?
The use of familial DNA matching in criminal investigations has led to the resolution of several cold cases beyond that of the Golden State Killer.