virginia trimble ritter 's daughter , marcia , was raped and choked to death by jerome sydney barrett in 1975 .
the case was nashville 's most notorious unsolved murder for 33 years .
ritter , who did not see her daughter 's body at the time , recently asked to see the photos investigators took at the scene .
after seeing the photos , ritter said she shouted , ` if i had a gun i 'd kill him ! '