Alexander Rismoen was a three-year-old boy when he was last seen in Phoenix, Arizona, on August 14, 2024. Online case information lists his date of birth as July 19, 2021, placing him at three years old when he disappeared. He was described as a white male child with blond hair and brown eyes. Alexander did not disappear alone. Another young child, Mia Rismoen, vanished from Phoenix on the same day, and the two cases have been publicized together ever since. Mia was four years old at the time, having been born on May 22, 2020, and was also described as having blond hair and brown eyes. What began that August day was therefore not simply the unexplained disappearance of one very young child, but a deeply troubling case involving two children who suddenly vanished from the same city under the same circumstances.
The information released publicly about what happened to Alexander and Mia is unusually limited, but one significant detail provides important context: the children were reportedly abducted by a non-custodial relative. No publicly accessible case information located identifies that relative by name, explains the person’s precise relationship to the children, or describes the events immediately preceding the abduction. There is also no detailed public account describing the address or neighborhood in Phoenix where Alexander was last seen, what he was wearing, what transportation may have been used, or where authorities believe the children may have been taken after they disappeared. Those missing details leave much of the story outside public view, but the characterization of the incident as an abduction by a non-custodial relative distinguishes Alexander’s disappearance from a child simply wandering away or becoming lost. Because Alexander was only three, he would have been entirely dependent on the adults around him for transportation, shelter, food, and safety, making information about the adult accompanying the children especially important to investigators seeking to determine their whereabouts.
Alexander and Mia continued to be listed together in missing-child case information after their disappearance. In December 2025, the missing-person advocacy organization For the Lost added Alexander and Mia Rismoen to its case files, preserving their information and continuing to direct anyone with knowledge of their whereabouts to law enforcement. The organization states that information used in compiling the case came from the National Center for Missing & Exploited Children and the Charley Project, two organizations that maintain information concerning missing children and long-term missing-person cases. The public case file directs anyone who may have seen the children or who possesses information about where they were taken to contact the Phoenix Police Department at 602-262-6151, noting that information can be provided confidentially. The continued circulation of their names and photographs is particularly important because children who disappear at such young ages can change considerably in appearance over time, while people who encountered them after August 2024 may not initially have realized they were connected to a missing-child investigation.
The disappearance of Alexander Rismoen remains a story defined as much by what has not been made public as by what is known. A very young boy disappeared from Phoenix alongside another young child on August 14, 2024, and available case information says they were taken by a non-custodial relative. Authorities and missing-person organizations have not publicly disclosed the relative’s identity, a destination, a vehicle, or a detailed sequence of events explaining how the children were taken. Those unanswered questions have left only a small number of confirmed facts around which the case can be understood: Alexander was three years old, he was last seen in Phoenix, Mia disappeared with him, and the circumstances were described as a family-related abduction involving someone who did not have custody. In overview, Alexander’s case concerns two exceptionally young children removed from their normal circumstances together, with very little investigative information released publicly and an enduring request that anyone who recognizes the children or knows where they were taken provide that information directly to Phoenix police.
Last Seen: Aug 14, 2024
