Diamond Bynum and her two‑year‑old nephew, King Rajan Walker, disappeared on July 25, 2015, from their family’s home on Matthews Street in the Brunswick neighborhood of Gary, Indiana. That morning began quietly. Diamond was at home with King and her stepmother. Around 10:20 a.m., her stepmother lay down for a short nap. When she woke approximately forty minutes later, Diamond and King were gone. There were no signs of forced entry, no disturbance inside the home, and nothing to suggest that anyone had forcibly taken them. It appeared that Diamond had simply walked out of the house with King.

Diamond was twenty‑one years old and lived with Prader–Willi syndrome, a genetic condition that caused cognitive impairment, compulsive hunger, and behavioral challenges. She was four feet eight inches tall and required daily medication to help regulate her behavior and functioning. She did not have that medication with her when she left the house. Although Diamond could walk several miles on her own, she could not safely care for a toddler, especially one who might tire easily or need to be carried. King, who was only two years old, could speak only a few words and would not have been able to tell a stranger his name, his family’s names, or where he lived.

Diamond had a history of wandering in search of food, but the family had just gone grocery shopping, and a chocolate cake sat untouched on the counter. For that reason, investigators and family members did not believe hunger motivated her to leave. Diamond had also recently moved to Gary in February of that year and did not know the neighborhood well. In her previous neighborhood, she sometimes took walks, and her family believed she may have attempted to do the same in Gary, not realizing she could easily become disoriented.

When the family discovered Diamond and King missing, they immediately contacted police. The family reports they were told they had to wait 24 hours. The family immediately began searching according to a newly released documentary.

The case remained agonizingly stagnant. No witnesses saw Diamond and King leave the home. No surveillance footage ever surfaced. No one reported seeing a young woman with cognitive disabilities walking with a toddler. Given Diamond’s limitations and King’s age, investigators believed they could not have traveled more than a few miles on foot. Yet exhaustive searches within that radius yielded nothing.

Diamond’s mother, Lashann Walker, continued to push for answers. She organized community events, spoke to media outlets, and kept her daughter and grandson’s names in public view. She has long believed that someone in the community knows what happened, even if they have never come forward. The case eventually gained national attention, appearing on Investigation Discovery’s “Hunt for the Missing: Chicago,” CrimeOnline’s “Finding the Lost: Black and Missing,” and in missing‑persons databases such as The Charley Project. Despite this exposure, the disappearance of Diamond Bynum and King Walker remains one of the most baffling unsolved cases in the region.

The core facts about Diamond and King’s disappearance come from a combination of local reporting, state police statements, national missing‑persons databases, and later documentary coverage. The earliest and most detailed reporting was done by the Northwest Indiana Times, which covered the case extensively between 2015 and 2017. Their articles documented the timeline of July 25, 2015, including the stepmother’s nap, the lack of forced entry, and the immediate assumption that Diamond had walked out with King. These articles also reported Diamond’s medical condition, her height, her cognitive limitations, and the family’s belief that she may have become disoriented in a neighborhood she did not know well.

Additional factual information comes from the Gary Police Department and Indiana State Police, both of which released public statements confirming the search efforts, the involvement of multiple agencies, the use of K‑9 units, and the lack of physical evidence. Indiana State Police also confirmed that the last tip they investigated came in 2017, though they did not disclose its content.

The National Center for Missing & Exploited Children (NCMEC) maintains active missing‑persons profiles for both Diamond Bynum and King Walker. These profiles include their physical descriptions, clothing, medical needs, and the official date and location of disappearance. NCMEC also provided age‑progression images over the years, which were referenced in later media coverage.

The Charley Project, a long‑running missing‑persons database, compiled information from police statements, family interviews, and local news reporting. Their entry on Diamond Bynum includes details about her Prader–Willi syndrome, her history of wandering, and the family’s belief that she may have left the house voluntarily. 

National media coverage came later. Investigation Discovery featured the case in its series “Hunt for the Missing: Chicago,” specifically in the episode titled “Lost in the Daylight.” This documentary included interviews with family members, investigators, and missing‑persons experts. It confirmed the lack of verified sightings, the absence of forensic evidence, and the ongoing status of the investigation.

CrimeOnline’s “Finding the Lost: Black and Missing” series also covered the case, drawing on interviews with Diamond’s mother, Lashann Walker, and summarizing the police investigation, the family’s search efforts, and the long‑term stagnation of leads.

Finally, several regional outlets, including ABC7 Chicago, WGN, and CBS Chicago, reported on the case during anniversaries or renewed search efforts. These reports reiterated the same core facts: no witnesses saw Diamond and King leave, no surveillance footage ever surfaced, and no confirmed sightings were ever validated.

If you know something about what happened to Diamond or King, or if you saw something on the day they disappeared, call the Indiana State Police at 219‑696‑6242. This number connects to the Lowell District, which has handled many of the investigative follow‑ups over the years. You can also call the Gary Police Department at 219‑881‑1260, where detectives continue to keep the case open and review any new information that comes in. For those who prefer not to give their name, there is an anonymous tip line at 219‑207‑8477, which allows callers to share what they know without identifying themselves. The National Center for Missing & Exploited Children also accepts tips at 1‑800‑843‑5678, and any information they receive is forwarded to the investigating agencies.