He has been connected to six murders in two states, though authorities estimate he may have killed up to 130 people across the country.
A bachelorette chose him among three suitors -- but after the show was taped, she reportedly refused to go out on a date with him.
Prosecutors said Alcala met Thornton on a road trip before killing her and burying her body on a ranch, the San Jose Mercury News reported.
Rodney Alcala on Tuesday was charged with first-degree murder in connection to the death of Christine Ruth Thornton.
Investigators believe the now 73-year-old Alcala killed Thornton in Sweetwater County based on a photo that appears to show her on remote public land near Granger, near where her remains were found.
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