As we reported here, the ailing 76-year-old was picked up in her Georgia home, stunning friends and neighbors, who knew her as a mild mannered waitress.
Court records from the 1970 case allege that Rivera was accused of killing her husband by "throwing hot grease on him and by throwing other substances and liquids."
They don't however, indicate a motive, but while neighbors say she told them that her husband had been abusive towards her, authorities said police were never called to the couple's Houston home on allegations of domestic violence.
Rivera had been a fugitive since she posted a $10,000 bond in 1970 following her indictment and authorities said she fled with her three children, including twin sons, and eventually made her way to Lake Park, GA, near the Florida border.
Neighbors questioned why Rivera was being arrested after so many years and noted her frail health, including heart, back and breathing problems.
But a spokesperson for the Harris County District Attorney's Office in Texas said Rivera needs to face justice.
She added: "The defendant was charged with committing a rather brutal murder of her husband. Although she was able to elude authorities for over 40 years, she ultimately must face judgment in a court of law for the murder of her husband."