Roberts’ skeletal remains were found off a gravel trail in rural Louisiana in October 2010. The body of her mother, Suellen Roberts, was found later in Arizona. Sanders confessed to killing both.
Prosecutor Bill Flanagan said Sanders shot the girl’s mother, Suellen Roberts, on a trip all three took to a wildlife park near the Grand Canyon, then drove Lexis Roberts to Louisiana, where he shot her four times and cut her throat.
Gibbens, who offered no explanation for the shootings called it ‘a vacation that went terribly, horribly, sadly wrong’.
Sanders was identified as a suspect long after he was thought dead.