Jury in Bristol convicted Rylanda Headley of 1967 rape-murder of Louisa Dunne. Victim found dead in her home after brutal rape and strangulation. DNA from victim's skirt matched Headley exactly. Fingerprints on entry window belonged to Headley. Headley previously jailed in 1977 for raping two elderly women aged 79 and 84. Case remained unsolved for nearly 60 years. Modern DNA analysis cracked the mystery. Headley faces life in prison at age 92. Prosecutor highlighted his impunity until now.