Here is a link to the video of the August 2016 Pikes Peak Historical Society Chautauqua, "The Vendetta of Felipe Espinosa" presented by author, Adam James Jones.
"As the Civil War raged and goldfields beckoned, a gunman stalked the territories on a mission to kill American settlers. He would elude governors and armies, bounty hunters and posses, until his demise at the climax of a fierce high-country manhunt. By the, Felipe Espinosa had claimed more than thirty lives to quietly become one of the nation's first serial killers and foreign terrorists.
A sweeping historical epic The Vendetta of Felipe Espinosa is a saga of Confederate guerrillas, marauding Indians, a severe religious order vigilante miners, and one migrant family looking for peace in a violent country."