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Michelle McNamara is gone but certainly not forgotten.

The journalist and author’s posthumous true crime book “I’ll Be Gone in the Dark” debuted at No. 1 on the New York Times’ Best Sellers list, and no one is more proud than her widower Patton Oswalt. The “Keeping Up With the Joneses” actor took to Twitter to pay tribute to his late wife’s accomplishment.

“I hope you know, sweetie. I feel like you know,” he tweeted along with a picture of the official list. “And I hope you know it when your work leads to his capture. #IllBeGoneInTheDark debuts at #1 on the @nytimes bestseller list. I’m so proud of you.”

“I’ll Be Gone in the Dark” follows McNamara’s investigation into The Golden State Killer, who committed at least 12 murders and more than 45 sexual assaults. He has never been identified or apprehended.

When Oswalt first received a copy of her book, he took it to her gravestone to show her.

“You did it, baby. The book is excellent, the writing brilliant. You tried to bring kindness to chaos, which was your way. #IllBeGoneInTheDark #MichelleMcNamara,” he tweeted.

McNamara died in her sleep at the age of 46 in April 2016. Oswalt and McNamara shared a daughter, Alice. He married actress Meredith Salenger in November 2017.