Authorities in northern Colorado have not confirmed the whereabouts of 16-year-old Matthew “Mateo” Alfaro, who was reported missing after he was last seen in Milliken on November 6, 2026. A separate death investigation near Colorado Highway 257 has intensified public concern, but available reporting has not established that the deceased person found there was the missing teenager.
The two developments have attracted attention across the Greeley and Milliken communities. However, the identity of the deceased person remains a critical unanswered question.
Disappearance Reported After Night in Milliken
Information circulated online indicated that Matthew was last seen in Milliken at approximately 11 p.m. Friday, November 6.
A further reported sighting placed him walking along Highway 60 in the direction of Greeley at around 1 a.m. Saturday. Posts seeking information about him also mentioned that his phone was last detected near Highway 257.
According to a local report, Matthew had attended a gathering in Milliken and reportedly told people he planned to walk home. These details have been shared as relatives and community members seek information that could help establish what happened after he was last seen.
Separate Death Investigation Near Highway 257
On Monday, November 9, emergency responders were called to an area near mile marker 1 on Colorado Highway 257, north of Highway 60. The response reportedly began shortly before 5 p.m.
The Johnstown Republic reported that emergency dispatch communications described a death investigation. Additional personnel were requested at the location.
Although the discovery prompted speculation about Matthew’s disappearance, the available local report did not identify the deceased person as the missing teenager.
There are also conflicting descriptions circulating online about where a body was found. Some social media posts referred to a field, while the local report described a deceased person discovered in water. Without an official statement connecting these accounts, neither description establishes what happened to Matthew.
Friends Appeal for Information
As the missing-person report gained attention, people identifying themselves as friends and acquaintances shared messages expressing concern and support.
Luis Ornelas reportedly remembered Matthew as a good friend who was usually in a positive mood. Gabriela Varela also described him as someone willing to help others.
Other online messages reflected sadness and concern, but these personal tributes do not confirm that Matthew has died.
Authorities Have Not Confirmed a Connection
The central issue remains the identity of the person discovered near Highway 257. The information available in the November 9 report did not establish whether that individual was Matthew Alfaro.
The circumstances surrounding the discovery, along with the person’s cause and manner of death, were also not confirmed in the supplied reporting.
Anyone with information about Matthew’s disappearance was directed to contact:
- Milliken Police Department: 970-587-2772
- Greeley Police Department: 970-350-9600
Information should be shared directly with investigators rather than relying on unverified social media claims.
What Is Known About Matthew Alfaro?
Matthew, also known as Mateo, is 16 and was reported missing after being last seen in Milliken on November 6. A possible sighting and reported phone-location information have been circulated, while a separate death investigation followed near Highway 257 on November 9.
However, there is no confirmed identification in the available report linking Matthew to the deceased person.
Obituary: No confirmed obituary or official announcement establishing Matthew Alfaro’s death has been provided.
Cause of Death: Unconfirmed. Authorities have not established that Matthew is the person involved in the Highway 257 death investigation.
Funeral Arrangements: No funeral or memorial arrangements have been confirmed.
Disclaimer: This report distinguishes the missing-person case from the separate death investigation. Claims that Matthew has been found dead should not be treated as confirmed without official identification.