Golden State killer: DNA links ex-US policeman to cold cases

April 27, 2018 | Brainwave Science

Golden State killer: DNA links ex-US policeman to cold cases: iCognative by Brainwave Science


A 72-year-old man has been arrested on suspicion of being the “Golden State Killer,” a notorious rapist and murderer who terrorized California in the 1970s and 1980s. According to officials from Sacramento, Joseph James DeAngelo, of Citrus Heights, California, was arrested on Tuesday and charged with two counts of murder. DeAngelo was a former policeman. “The magnitude of this case demanded that it be solved,” Sacramento County district attorney Anne Marie Schubert said at a press conference. “This case deeply affected this entire state.”

Sacramento County Sheriff Scott Jones said DeAngelo had been arrested for the February 2, 1978 murders of a newlywed couple, Brian Maggiore and his wife, Katie, who were both shot to death in Rancho Cordova while walking their dog.

Also known as the “East Area Rapist” and “Original Nightstalker,” the Golden State Killer carried out at least 12 murders, more than 50 rapes and 120 home burglaries in California between 1976 and 1986, according to the FBI. His victims ranged in age from 13 to 41.

“This defendant has been able to live here in a nice suburb in Sacramento,” said the Orange County district attorney, Tony Rackauckas. “Our team is going to work hard to make sure he never gets out.”

According to the FBI, the Golden State Killer carried out his attacks starting in the summer of 1976 in the suburbs of Sacramento, California’s state capital.

The assailant would break into homes during the night and tie up and rape his female victims, investigators said. He would take items from the residences including coins, cash, identification, and jewelry.

Most of the early attacks occurred in the area of Sacramento, but the FBI said DNA evidence had connected the suspect to a series of rapes and murders in the San Francisco Bay area and the southern part of the state.

The last known case linked to the Golden State Killer was the May 1986 rape and murder of an 18-year-old girl in Irvine.


12 murders, 51 rapes, and more than 120 burglaries is a devastating number to be assigned to one single person. The case of the Golden State Killer, 40 years later, represents a true challenge for Law enforcement. Their mission is to deliver justice, no matter if so many years later.

40 years ago, Law enforcement had access to other security and investigative means; they were limited. Even now, some of the means at their disposal still fail to deliver the best results. Technologies such as DNA testing or the polygraph are contextual and limited; even more so, they are time and money consuming and offer little results.

All the victims or the victims’ families from the cold cases that happened 40 years ago still deserve justice and answers regarding who the person responsible for them is.

So how can Law enforcement demonstrate that DeAngelo is responsible for all of the accusations in order to bring light over so many unsolved cases?


Did you ever imagine that technological advancements could produce a security and investigative solution so advance, that it can discover information stored in the human brain even years after an event happened?

iCognative developed by reputed Boston based company Brainwave Science makes all this possible through a groundbreaking technology that can distinguish between innocents and perpetrators. Its applicability extends to Law Enforcement, Border Security, Counterintelligence, and Counterterrorism. With its aid, authorities across the globe can make their investigative strategy more effective and efficient than ever.

iCognative brings to the table an automated system that is not prone to human error, as it needs minimal human intervention. The algorithms that rely on the response of the human brain to different stimuli represent the key behind it.

In the case of the Golden State Killer, the technology can advance Law enforcement‘s investigations. A test case needs to be built in order to conduct a test on the subjects. Anyone relevant to the case can be a subject, but let’s start with the suspect in custody – Joseph James DeAngelo. The test can be built for each crime, rape or burglary. It only takes 15 minutes to do so. All the confidential information, known only to investigative agents and relevant to the suspect, will be input into the system as stimuli, in their available form, either pictures or text.

Let’s consider the known information so far: the dates of each rape, murder or burglary – information that the police possess, such as, February 2nd, 1978, when the murder of Brian and Katie Magglore occurred, the period of time for the criminal acts – during 1976-1986; the location for each crime; stolen goods like coins, cash, identification and jewelry. For each unsolved case connected to the Golden State killer, all the known facts will be the stimuli used in the system.

During the iCognative test, all the selected case stimuli will be displayed on a computer screen. The brain releases a tiny positive potential released by the perpetrator’s brain for every significant information involved in the attack and if this potential is captured and analyzed, then the result clearly shows that particular specific information is stored in perpetrator’s brain. The system will collect and analyze each brain response, and with 99.9% accuracy will determine if the information is present or absent in the suspect’s brain.

The test can be repeated on DeAngelo and any other relevant person of interest with new stimuli, depending on each cold case and the information collected.

With this groundbreaking test, law enforcement can put behind bars for good the criminal and bring peace to all the people affected by the 10 years criminal spree.



The Guardian