Plummer became pregnant again almost as soon as she was returned home, and on January 4, 1839, bore a third child, a son, Luther Plummer II. She died in Houston shortly thereafter, on March 19, 1839; the child died two days later. Though medically she was listed as dying from complications after childbirth, James Parker did not believe that, and insisted she died from the mistreatment she suffered at the hands of the Comanche, the murder of one child, and not knowing what happened to her other child. However, the most likely cause of her death is the trek that she, her husband, her father and several others were forced to make during a night of freezing rain. During James Parker's search for her, he made more than a few enemies: in an unexplained incident, he was accused of murdering a woman and her child. The victims' family had finally found Parker and were going to avenge their murdered family members, so Parker snuck his family out of the house during the night, sleeping outdoors and staying off roads. Rachel and her baby died during that trek. The night before she died, Plummer reportedly told her father "if only I knew what had become of my dear little James Pratt Plummer I could die in peace." At the time of her death, she was 20 years old and her fiery red hair had turned grey. Her oldest, and only living, son was recovered two years later. Late in 1842 James Pratt Plummer was ransomed, and in 1843 he was reunited with his grandfather.