with good morning america s robin roberts, clinton reached out to hartley s mother who made this emotional plea to help find her son s body. hillary, it s like mother to mother. help me bring my son home. please. we are helping. the united states government is supporting local law enforcement, supporting authorities on the border, doing everything that we know to do to try to assist. reporter: we showed hartley s wife, secretary clinton s response. if she s realizing what s going on, then they need to start acting on what s going on. reporter: the alleged murder is now raising big questions about just how brutal the mexican drug cartels have become. the mexican official, investigating hartley s case, his head turned up in a suitcase. his decapitation didn t make news in the most violent areas of mexico. the search for hartley s body was called off, but his family is determined to never give up. my mind has been fighting