How did capote decide to write the novel?

While flipping through The New York Times on a November morning, he had come across a brief article outlining the murders with only the barest details (“Wealthy Farmer, 3 of Family Slain”), and imagined the case could be the subject of his next project, a long-form work of nonfiction. By mid-December, he was on a train to Kansas, eager to see what more he could uncover