LOS ANGELES — A federal jury has found four members of Mara Salvatrucha (MS-13) guilty of carrying out three gruesome murders in the Angeles National Forest in 2017, including the killing of a victim whose heart was carved from his chest. Los Angeles County Deputy District Attorney Eric W. Siddall prosecuted the case as a cross-designee in the U.S. Attorney’s Office, serving as a Special Assistant United States Attorney.