Nicolas Mateo was a 35-year-old Hispanic/Latino man when he was last seen in Casa Grande, Arizona, on September 3, 2005. Publicly available missing-person records consistently identify Casa Grande as his last known location and September 3 as the date of his disappearance. He is listed as male, with an estimated height between 5 feet 3 inches and 5 feet 5 inches.
His recorded weight range is unusually broad, from approximately 100 to 300 pounds, while both his hair color and eye color are listed as unknown. The case is associated with NamUs number MP15858, providing Nicolas with a permanent entry in the national system used to document and assist with missing-person investigations.
What happened around the time Nicolas was last seen remains only sparsely described in the public-facing online sources available for his case. The records confirm that his disappearance is connected to the Casa Grande area, but they do not provide a specific street address, residence, business, intersection, or other precise place where he was last observed. Likewise, the available summaries do not identify the time of day he was last seen, the person who last saw or spoke with him, what clothing he may have been wearing, whether he was traveling in a vehicle, or whether anyone was known to be with him. No photograph appears with the principal online case summary located for Nicolas, leaving the limited physical description as one of the few publicly accessible means of describing him. These omissions make the passage of time especially difficult: rather than offering a detailed sequence of his final known movements, the public record preserves only a small collection of facts surrounding a man who was 35 when contact with him was lost.
Nicolas's disappearance was eventually entered into the National Missing and Unidentified Persons System, where his case is identified as MP15858. NamUs is a national centralized repository used for missing, unidentified, and unclaimed person cases in the United States, and the program provides investigative and forensic resources intended to help authorities compare missing-person records with other information that could eventually lead to an identification or resolution. An independent case listing for Nicolas specifically identifies NamUs as its featured government source and repeats the central facts of his disappearance: he was 35 years old, disappeared on September 3, 2005, and was missing from Casa Grande, Arizona. The continued appearance of his record in online missing-person listings preserves his identity and the basic circumstances of his disappearance even though considerably more detailed information about the investigation has not been made publicly available through the sources located.
The physical information attached to Nicolas's case is similarly limited but potentially important. Online records describe him as Hispanic/Latino, male, approximately 5 feet 3 inches to 5 feet 5 inches tall, with his hair and eye colors unknown. The recorded weight range of 100 to 300 pounds is so broad that it offers little certainty about his appearance at the time he vanished, underscoring how incomplete the surviving public description is. No dependable publicly available information located for this synopsis establishes distinctive scars, tattoos, jewelry, clothing, personal belongings, or transportation that could narrow an identification. For Nicolas's family and anyone who knew him, the absence of such details cannot diminish the fact that behind the database entry is a person whose whereabouts became unknown and whose story has remained associated with that September day in Casa Grande.
More than two decades after Nicolas Mateo was last seen, the publicly accessible record still leaves substantial unanswered questions about the events surrounding his disappearance. The sources located do not provide a detailed chronology of his final day, explain why contact with him stopped, or describe subsequent investigative developments sufficient to reconstruct what happened after he was last known to be in Casa Grande. What can be stated with confidence is that Nicolas was a 35-year-old man last seen in Casa Grande, Arizona, on September 3, 2005; he is documented as Hispanic/Latino, approximately 5 feet 3 inches to 5 feet 5 inches tall, and his missing-person case is recorded under NamUs MP15858. His case is therefore defined as much by what remains unknown as by the few facts that have endured in the public record: Nicolas disappeared from the Casa Grande area in 2005, only a limited physical description and location information have been publicly circulated, and the available online sources preserve his name and case information while leaving the circumstances surrounding his disappearance largely unexplained.Last Seen: Sep 3, 2005
