He would not elaborate on the domestic dispute , saying authorities are still trying to piece together what happened . Shirley McGill , 55 , was found dead in her cabin on the Carnival cruise on Tuesday . Husband Robert McGill , in mid-50s , charged with murder on the high seas , FBI says . FBI and Carnival cruise owners say domestic violence Tuesday night led to death .
Shirley McGill , 55 , was found dead in her cabin on the Carnival cruise on Tuesday . Husband Robert McGill , in mid-50s , charged with murder on the high seas , FBI says . FBI and Carnival cruise owners say domestic violence Tuesday night led to death .