A fair number of rape/murders in a woman's home are committed by a burglar who didn't expect someone to be home, but chose to kill rather than leave a witness, and chose to rape because why not? He's already grappling with the intent to kill.
I am reminded of the Kevin Green case
DNA 🧬🧬🧬 evidence (not a thing yet at the time of his conviction) would later prove that his wife’s rape was committed by a black man; who was a serial rapist and murderer