160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! ALAMOGORDO, N.M. – Jurors convicted a 16-year-old boy Tuesday of killing his family and hiding their bodies in a manure pile on newsman Sam Donaldson’s ranch in southern New Mexico. Cody Posey was found guilty of murder in the deaths of his stepmother and stepsister and voluntary manslaughter in the death of his father, who worked as Donaldson’s ranch foreman. Posey hung his head and wept as the verdicts were read, and defense attorney Gary Mitchell offered consolation by putting an arm on the teen’s shoulder. “I just held him like I would my own son,” Mitchell said. AD Quality Auto 360p 720p 1080p Top articles1/5READ MORESanta Anita opens winter meet Saturday with loaded card The jury, which heard three weeks of testimony, began deliberating on Monday. Posey was arrested a few days after the bodies of his father and stepmother, Paul and Tryone Posey, and his 13-year-old stepsister, Mary Lee Schmid, were found on Donaldson’s Chavez Canyon Ranch in July 2004. Prosecutor Janice Schryer claimed that Posey’s parents were loving, but said the youth didn’t like ranch life and “took the opportunity to relieve himself of those expectations and that life.” Mitchell argued that the teen, who was 14 at the time of the slayings, was abused by his parents.