robert dellinger told investigators he was trying to kill himself in december 2013 when he drove his pickup truck across an interstate 89 median and smashed into an suv carrying 24-year-old .
murphy 's mother , tammy langlois , and murphy 's sister , ashley murphy , cry after speaking about the moment they learned of the accident that killed murphy , her unborn child , and her fiancee , jason timmons .
relatives of murphy and timmons tore into dellinger during the first of the two-day sentencing hearing .