‘I’m guilty’: Florida man confesses to 2012 triple murder of wife and two stepdaughters, reveals disturbing details

Alberto Sierra admitted guilt for the 2012 murders of his wife and two young daughters. He confessed to stabbing Gladys Machado and suffocating Julia and Daniela Padron. Their bodies were discovered by a neighbor three days after the killings. Sierra's guilty pleas followed his initial statements to investigators about the crimes. A jury will now decide if he receives life in prison or the death penalty.