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Case Description

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Summary based on the NamUs case record (MP16562) and 1 other source
In the summer of 2010, a 40-year-old woman named Irma Licet Cruz Monzon vanished under distressing circumstances in the Arizona desert. On June 29, 2010, Irma, a Hispanic female with black hair and brown eyes, was last seen near Sasabe, Arizona, a small community on the U.S.-Mexico border. She was reportedly attempting to cross the border with a group of other people. At the time of her disappearance, she was wearing a black short-sleeved t-shirt, blue jeans, and white sneakers. Irma, who also went by the alias Irma Liseth Cruz Sarceno, was about 5 feet 2 inches tall and weighed approximately 150 pounds. A noticeable scar on one of her arms near the elbow served as a distinguishing physical feature.

The account of Irma's last known moments is harrowing and paints a picture of a perilous journey that took a tragic turn. According to reports, a member of the group she was traveling with made a phone call to a friend in Guatemala. This friend then relayed the information to Irma's husband, creating a fragmented but alarming narrative of what had transpired. The caller stated that Irma had become faint and was unable to continue with the group. Despite being given water, her condition did not improve. The last image described was of Irma leaning against a tree, with another person from the group staying behind with her as the others moved on.

From that point forward, a veil of silence and uncertainty descended upon Irma's fate. No further information has ever surfaced regarding what happened to her or the individual who reportedly remained by her side. The vast and unforgiving terrain of the Sonoran Desert holds the secrets of her disappearance. The Pima County Medical Examiner's Office opened a case for her on July 13, 2010, but the circumstances surrounding her vanishing remain unresolved. The case serves as a somber reminder of the dangers faced by those who undertake the treacherous journey across the border, and a testament to the enduring pain and ambiguity that families of the missing are forced to endure.

Last Seen: Jun 29, 2010

Links to Additional Sources (1)

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Possible Unidentified Matches (10)

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.

83%Moderate
Jane Doe — Sells, Arizona - unidentified case UP9038
Jane Doe — Sells, Arizona
UP9038 • Found Jun 23, 2010
View case
Sex ✓Female
Age 100%Est. 30–45 vs 40
Race 100%Hispanic
Location 93%35 mi away, same county
TimingFound same day as last seen
Height 100%5'3" vs 5'2"
Hair 60%Brown vs Black
Eyes 100%Brown vs Brown
80%Moderate
Jane Doe — Sonoita, Arizona - unidentified case UP10579
Jane Doe — Sonoita, Arizona
UP10579 • Found Mar 24, 2012
View case
Sex ✓Female
Age 100%Est. 25–40 vs 40 when missing
Race 100%Hispanic
Location 88%54 mi away, same state
TimingFound 21 months after last seen
Height 100%5'2" vs 5'2"
79%Possible
Jane Doe — Cowlic, Arizona - unidentified case UP8699
Jane Doe — Cowlic, Arizona
UP8699 • Found Feb 13, 2011
View case
Sex ✓Female
Age 85%Est. 30–55 vs 40
Race 100%Hispanic
Location 94%34 mi away, same county
TimingFound 8 months after last seen
Height 100%5'2" vs 5'2"
78%Possible
Jane Doe — Tubac, Arizona - unidentified case UP10284
Jane Doe — Tubac, Arizona
UP10284 • Found Nov 8, 2011
View case
Sex ✓Female
Age 100%Est. 30–45 vs 40 when missing
Race 100%Hispanic
Location 95%30 mi away, same state
TimingFound 16 months after last seen
Height 68%5'5" vs 5'2"
78%Possible
Jane Doe — Vamori, Arizona - unidentified case UP160999
Jane Doe — Vamori, Arizona
UP160999 • Found Mar 10, 2026
View case
Sex ✓Female
Age 100%Est. 28–42 vs 40 when missing
Race 100%Hispanic
Location 96%27 mi away, same county
TimingFound 16 years after last seen
Height 100%4'10"–5'3" vs 5'2"
77%Possible
Unidentified Person — Vamori, Arizona - unidentified case UP80660
Unidentified Person — Vamori, Arizona
UP80660 • Found Nov 25, 2020
View case
Age 100%Est. 30–45 vs 40 when missing
Race 100%Hispanic
Location 96%27 mi away, same county
TimingFound 10 years after last seen
Height 100%5'2"–5'6" vs 5'2"
77%Possible
Jane Doe — Arizona - unidentified case UP12743
Jane Doe — Arizona
UP12743 • Found Jun 12, 2014
View case
Sex ✓Female
Age 100%Est. 25–40 vs 40 when missing
Race 100%Hispanic
Location 92%40 mi away, same county
TimingFound 4 years after last seen
Height 52%4'10" vs 5'2"
Hair 100%Black vs Black
76%Possible
Jane Doe — Vamori, Arizona - unidentified case UP85566
Jane Doe — Vamori, Arizona
UP85566 • Found Jun 28, 2021
View case
Sex ✓Female
Age 100%Est. 38–52 vs 40 when missing
Race 100%Hispanic
Location 96%27 mi away, same county
TimingFound 11 years after last seen
Height 75%5'0"–5'7" vs 5'2"
76%Possible
Jane Doe — Vamori Village, Arizona - unidentified case UP10409
Jane Doe — Vamori Village, Arizona
UP10409 • Found Mar 24, 2012
View case
Sex ✓Female
Age 100%Est. 35–50 vs 40 when missing
Location 96%27 mi away, same county
TimingFound 21 months after last seen
Height 100%5'2" vs 5'2"
75%Possible
Jane Doe — Arizona - unidentified case UP8778
Jane Doe — Arizona
UP8778 • Found Apr 20, 2011
View case
Sex ✓Female
Age 100%Est. 32–45 vs 40
Race 100%Hispanic
Location 92%40 mi away, same county
TimingFound 10 months after last seen
Height 36%4'9" vs 5'2"

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.

Unidentified photos are blurred because many are post-mortem. Tap a photo to reveal it.