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Case Description

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Summary based on the NamUs case record (MP40433)
In the spring of 2015, a then 27-year-old man named Guillerno Serna Quintero vanished under uncertain circumstances. He was last known to be in Nogales, Arizona, around April 18th of that year. At the time of his disappearance, he was described as a Hispanic/Latino and White/Caucasian male with brown hair and brown eyes, standing at approximately 5 feet 5 inches tall and weighing around 150 pounds. The last reported sighting of him involved the vague information that he was crossing into Arizona from Mexico at an unknown location. Since that time in April 2015, there has been no contact with him, and his case has been under the investigation of the Maricopa County Sheriff's Office.

Details surrounding Guillerno's disappearance remain sparse, contributing to the difficulty in the search. The circumstances provided indicate that he was last known to be wearing a black t-shirt, a hat, and gray shoes. He has several distinct tattoos that could aid in his identification, including the phrase 'Maria Madre Mia' on his neck, the name 'Francisco' on his right back, and a tattoo of 'TAZ' on his right arm. Additionally, he has a scar on his forehead. These physical markers are crucial pieces of information for law enforcement and the public in the ongoing effort to locate him or uncover what happened.

The investigation into Guillerno Serna Quintero's disappearance has been active since it was reported to the Maricopa County Sheriff's Office on October 21, 2017. Despite the passage of time, his case remains open, and the lack of concrete leads has left his family and investigators with more questions than answers. The overview of this case highlights the ambiguous and concerning nature of his last known movements, crossing the border from Mexico into Arizona. The absence of any communication or sightings since April 2015 paints a somber picture, leaving a void of information and a continued search for a man who seemingly vanished after taking a step into a new state.

Last Seen: Apr 18, 2015

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Possible Unidentified Matches (6)

Unidentified remains cases whose details are consistent with this person, ranked by how closely they compare. Fields that are unknown in either case are left out of the score.

76%Possible
John Doe — Indio, California
UP17830 • Found Jul 26, 2016
View case
Sex ✓Male
Age 100%Est. 28–42 vs 27 when missing
Race 100%White
Location 40%349 mi away
TimingFound 15 months after last seen
Height 100%5'5" vs 5'5"
Weight 100%142 lb vs 150 lb
Hair 100%Brown vs Brown
Eyes 100%Brown vs Brown
76%Possible
John Doe — Winterhaven, California
UP15584 • Found May 30, 2016
View case
Sex ✓Male
Age 100%Est. 25–35 vs 27 when missing
Race 100%White
Location 51%237 mi away
TimingFound 13 months after last seen
Height 100%5'6" vs 5'5"
Weight 93%130 lb vs 150 lb
Hair 60%Black vs Brown
Eyes 100%Brown vs Brown
75%Possible
John Doe — Eloy, Arizona
UP97199 • Found Jan 16, 2022
View case
Sex ✓Male
Age 100%Est. 23–34 vs 27 when missing
Race 100%White
Location 74%104 mi away, same state
TimingFound 7 years after last seen
Height 100%5'4"–5'9" vs 5'5"
75%Possible
John Doe — Gila Bend, Arizona - unidentified case UP14564
John Doe — Gila Bend, Arizona
UP14564 • Found Oct 18, 2015
View case
Sex ✓Male
Age 100%Est. 27–37 vs 27
Race 100%White
Location 65%152 mi away, same state
TimingFound 6 months after last seen
Height 84%5'3" vs 5'5"
Weight 39%96 lb vs 150 lb
Hair 100%Brown vs Brown
75%Possible
John Doe — Near Mountain Village, Arizona - unidentified case UP15177
John Doe — Near Mountain Village, Arizona
UP15177 • Found Aug 24, 2015
View case
Sex ✓Male
Age 100%Est. 20–28 vs 27
Race 60%Hispanic
Location 85%66 mi away, same state
TimingFound 4 months after last seen
Height 100%5'5" vs 5'5"
75%Possible
John Doe — Kino Springs, Arizona - unidentified case UP131896
John Doe — Kino Springs, Arizona
UP131896 • Found Jun 26, 2024
View case
Sex ✓Male
Age 100%Est. 28–38 vs 27 when missing
Race 60%Hispanic
Location 100%8 mi away, same county
TimingFound 9 years after last seen
Height 100%5'4"–5'8" vs 5'5"

These comparisons are generated automatically from public NamUs case data and are not confirmed identifications. Only DNA, dental or fingerprint comparison by investigators can confirm an identity. If you believe two cases are connected, contact the agency handling the unidentified case.

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