He was notoriously murdered in 1851 in a scandal involving American prospectors seeking to discredit the land claims of Californios.
He came to Alta California with the Hijar-Padres Colony in 1834, and settled in Yerba Buena (San Francisco).
[2][3] In 1844 he was granted Rancho Corral de Tierra, located in present-day San Mateo County, California.
[4][5] The official account states that Guerrero was assaulted by François LeBras, a man described as small, feeble, and generally considered insane.
Despite evidence suggesting Guerrero had been struck with a club or slungshot before falling, LeBras was found innocent without the jury even leaving the box.