Preston Wright , 21 , killed his girlfriend , Sarah Owen , 23 , with a knife . Wright then turned the weapon on himself inside the home in Norman . Officers were met by a boy , thought to be Wright 's brother , at the house . He said Owen had been cleaning out the garage when she got into a fight with Wright . Eyewitnesses first saw the couple arguing outside of the home . Police found the couple dead inside the house with severe stab wounds .
Preston Wright , 23 , killed his girlfriend , Sarah Owen , 21 , with a knife . Wright then turned the weapon on himself inside the home in Norman . Officers were met by a boy , thought to be Wright 's brother , at the house . He said Owen had been cleaning out the garage when she got into a fight with Wright . Eyewitnesses first saw the couple arguing outside of the home . Police found the couple dead inside the house with severe stab wounds .