She died in her sleep in 2016 at age 46.
At a news conference held by law enforcement agencies to announce the arrest, an official said that the book "kept interest and tips coming in" and kept the case in the public eye, but noted that information from the book had not led directly to DeAngelo's arrest. He did and the book instantly became a New York Times bestseller.
Oswalt on Wednesday said he was not surprised his late wife was being denied some credit from authorities.
The source says the suspect was caught through "sophisticated" DNA analysis.
Oswalt also said he hoped to meet the killer, "not to gloat or gawk,"but to ask him the questions that McNamara had wanted to, as outlined at the end of her book".
"He's running out of time", he told the audience.
Ward said it's possible that DeAngelo helped with the search for Snelling's killer and the elusive burglar but he doesn't recall DeAngelo directly investigating the killing.
After 10 more years, Debbi said in an article written by Regina Crutcher and published in the Press-Reporter in July of last year, DNA taken at the murder scene over 30 years earlier had confirmed that link. Many of whom have spoken out since DeAngelo's arrest, including Jane Carson-Scott, a victim who appears in the book and expressed joy at the arrest on Megyn Kelly Today Thursday morning.
Lamesa resident Debbi Domingo-McMullan has tears of joy after hearing the "Golden State Killer" is in custody, the man who took the life of her mom Cheri Domingo and her mom's boyfriend, Greg Sanchez.
Authorities were seeking weapons and other items that could link the suspect to the crimes, Sacramento County Sheriff's Lt. Paul Belli said.
Police in California have arrested a man they believe is the Golden State Killer, nearly four decades after his first victim was murdered.
DeAnglo has so far been charged with six counts of murder.
While Domingo-McMullan says, "the hunt" is over, she knows there's a long way to go.
"I think you got him, Michelle", Oswalt wrote on Twitter just after news broke that 72-year-old Joseph DeAngelo had been cuffed. They relied on a different website than they had in the OR search, and they did not seek a warrant for DeAngelo's DNA.
Lo and behold, not long after this the Associated Press reported Friday that court records from March 2017 show police misidentified a 73-year-old OR man as a possible suspect by using information from "genetic websites".
He said the high-profile arrest of DeAngelo should raise legal and privacy concerns for the millions who have submitted their DNA to an ancestry site database as there are no strong privacy laws to keep police from trolling.
The news struck home for many of McNamara's fans and friends, who expressed their wishes that she could live to see an arrest in the case that she dedicated her life to. It's likely that one of those scanned documents might just turn up in the courtroom, when the alleged Golden State Killer faces the justice McNamara so desired.