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298 Cases Solved. Advancing justice for missing persons, unsolved homicides, unidentified and unclaimed remains.

Case Description

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Summary based on the NamUs case record (MP16291) and 1 other source
In the vast and often unforgiving landscape of the Arizona desert, the story of Monica Silva Ortiz's disappearance is one that echoes the perils faced by many who traverse the U.S.-Mexico border. At 43 years old, Monica was last seen on July 21, 2009, in the area of Sasabe, Arizona, a small, remote community situated directly on the international boundary. Her last known moments were spent crossing this border, a journey fraught with uncertainty and risk. The circumstances surrounding her disappearance are sparse, adding to the distress of her loved ones. It is known that after crossing, she was left at a location described as being four hours north of Sasabe, a vague and desolate point in the expansive Pima County wilderness.

Monica, a Hispanic female with black hair and brown eyes, stood between 5 feet and 5 feet 3 inches tall. She had a few distinguishing marks that her family hoped would aid in her identification: a burn scar on the back of one of her hands and a mole on her left clavicle. When she vanished, she was believed to be carrying several important personal documents, including her Mexican passport, a birth certificate, a credential, and the death certificate of her mother, Natalia Ortiz. The presence of these documents suggests a journey with a purpose, a life being moved from one place to another, now indefinitely paused. The Pima County Medical Examiner's Office opened a case for her on August 18, 2009, nearly a month after she was last seen, beginning a long and so far fruitless search for answers.

The narrative of Monica's disappearance is a poignant reflection of the dangers inherent in border crossings. Left in a remote area, the possibilities of what could have happened are numerous and harrowing. The desert is an unforgiving environment, and the isolation could have left her vulnerable to any number of dangers. The lack of specific details about who she was with or the exact location where she was left has made the investigation incredibly challenging. The case is an overview of ambiguity and the heartache of not knowing. For her family, the passage of time has not brought closure, only the enduring pain of a loved one who seemingly vanished into the arid landscape of the American Southwest.

Last Seen: Jul 21, 2009

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 43
Race 100%Hispanic
Location 93%35 mi away, same county
TimingFound 11 months after last seen
Height 100%5'3" vs 5'0"–5'3"
Hair 60%Brown vs Black
Eyes 100%Brown vs Brown
81%Moderate
Jane Doe — Sells, Arizona - unidentified case UP9050
Jane Doe — Sells, Arizona
UP9050 • Found Apr 10, 2010
View case
Sex ✓Female
Age 85%Est. 30–50 vs 43
Race 100%Hispanic
Location 93%35 mi away, same county
TimingFound 9 months after last seen
Height 100%5'3" vs 5'0"–5'3"
Hair 100%Black vs Black
80%Moderate
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 43 when missing
Race 100%Hispanic
Location 95%30 mi away, same state
TimingFound 2 years after last seen
Height 84%5'5" vs 5'0"–5'3"
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 43 when missing
Race 100%Hispanic
Location 94%34 mi away, same county
TimingFound 19 months after last seen
Height 100%5'2" vs 5'0"–5'3"
78%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 43 when missing
Race 100%Hispanic
Location 92%40 mi away, same county
TimingFound 21 months after last seen
Height 68%4'9" vs 5'0"–5'3"
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 43 when missing
Race 100%Hispanic
Location 96%27 mi away, same county
TimingFound 11 years after last seen
Height 100%5'2"–5'6" vs 5'0"–5'3"
77%Possible
Jane Doe — Pisinimo Village, Arizona - unidentified case UP8770
Jane Doe — Pisinimo Village, Arizona
UP8770 • Found Mar 17, 2011
View case
Sex ✓Female
Age 100%Est. 30–45 vs 43 when missing
Race 100%Hispanic
Location 86%59 mi away, same county
TimingFound 20 months after last seen
Height 68%4'9" vs 5'0"–5'3"
Hair 60%Brown 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 43 when missing
Race 100%Hispanic
Location 96%27 mi away, same county
TimingFound 12 years after last seen
Height 75%5'0"–5'7" vs 5'0"–5'3"
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 43 when missing
Location 96%27 mi away, same county
TimingFound 3 years after last seen
Height 100%5'2" vs 5'0"–5'3"
76%Possible
Jane Doe — Vamori, Arizona - unidentified case UP160999
Jane Doe — Vamori, Arizona
UP160999 • Found Mar 10, 2026
View case
Sex ✓Female
Age 90%Est. 28–42 vs 43 when missing
Race 100%Hispanic
Location 96%27 mi away, same county
TimingFound 17 years after last seen
Height 100%4'10"–5'3" vs 5'0"–5'3"

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.