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Crime Solvers Central
302 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 (MP16873) and 2 other sources
In the winter of 2011, a young woman named Karla Elizabeth Serna Davila, just 18 years old, vanished after planning to cross the border into the United States. A Hispanic female with long, straight black hair and brown eyes, Karla was last in contact with her family on December 12, 2011. During that final phone call, she told them she was in Nogales, Mexico, and intended to cross the border into Nogales, Arizona, the following day. At the time, she was described as being between 5 feet 3 inches and 5 feet 8 inches tall and weighing between 145 and 155 pounds. Her distinguishing features included pierced ears, a scar on her upper right eyebrow, and a mole on the lower right side of her chin.

When she was last heard from, Karla was believed to be wearing a brown and yellow cotton shirt, gray cotton pants, and a gray cotton sweater. The circumstances surrounding her disappearance are sparse, with the primary information being her stated intention to cross the border. It is believed she may have crossed into the United States on or around December 15, 2011, a few days after her last communication with family. The case was officially reported to law enforcement later that month, on December 29, 2011.

The investigation into Karla’s disappearance is being handled by the Pima County Medical Examiner's Office in Tucson, Arizona. Her case remains an active missing person investigation, a painful uncertainty for those who knew her. The narrative of her case is a stark reminder of the risks individuals can face at the border. The last known details of her journey point to a young woman on the cusp of a new chapter, a chapter that was tragically left unwritten. The overview of her case is one of hope dimming into a long and unresolved absence, leaving her family with unanswered questions about her fate after she made that final phone call from Nogales.

Last Seen: Dec 12, 2011

Links to Additional Sources (2)

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Possible Unidentified Matches (8)

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.

82%Moderate
Jane Doe — Amado, Arizona - unidentified case UP11224
Jane Doe — Amado, Arizona
UP11224 • Found Jan 21, 2013
View case
Sex ✓Female
Age 100%Est. 18–30 vs 18 when missing
Race 100%Hispanic
Location 96%27 mi away, same county
TimingFound 13 months after last seen
Height 100%5'4" vs 5'3"–5'8"
82%Moderate
Jane Doe — near Sasabe, Arizona - unidentified case UP10654
Jane Doe — near Sasabe, Arizona
UP10654 • Found Jul 16, 2012
View case
Sex ✓Female
Age 100%Est. 16–20 vs 18
Race 100%Hispanic
Location 93%37 mi away, same state
TimingFound 7 months after last seen
Height 100%5'2" vs 5'3"–5'8"
81%Moderate
Jane Doe — Nogales, Arizona - unidentified case UP132769
Jane Doe — Nogales, Arizona
UP132769 • Found Jul 21, 2024
View case
Sex ✓Female
Age 100%Est. 26–35 vs 18 when missing
Race 100%Hispanic
Location 100%Same area, same county
TimingFound 13 years after last seen
Height 100%5'3" vs 5'3"–5'8"
Hair 100%Black vs Black
80%Moderate
Jane Doe — 6 miles e/o San Miguel Village, Arizona - unidentified case UP12086 View case
Sex ✓Female
Age 100%Est. 16–23 vs 18 when missing
Race 100%Hispanic
Location 88%53 mi away, same state
TimingFound 20 months after last seen
Height 100%5'3" vs 5'3"–5'8"
77%Possible
Jane Doe — San Miguel, Arizona - unidentified case UP132360
Jane Doe — San Miguel, Arizona
UP132360 • Found Jul 11, 2024
View case
Sex ✓Female
Age 100%Est. 17–20 vs 18 when missing
Race 100%Hispanic
Location 88%53 mi away, same state
TimingFound 13 years after last seen
Height 100%4'10"–5'2" vs 5'3"–5'8"
76%Possible
Jane Doe — Sasabe, Arizona - unidentified case UP56633
Jane Doe — Sasabe, Arizona
UP56633 • Found Dec 21, 2018
View case
Sex ✓Female
Age 100%Est. 18–30 vs 18 when missing
Race 100%Hispanic
Location 93%37 mi away, same state
TimingFound 7 years after last seen
Height 75%4'7"–5'2" vs 5'3"–5'8"
76%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 18 when missing
Race 100%Hispanic
Location 85%63 mi away, same state
TimingFound 14 years after last seen
Height 100%4'10"–5'3" vs 5'3"–5'8"
75%Possible
Jane Doe — Near Marana, Arizona - unidentified case UP12295
Jane Doe — Near Marana, Arizona
UP12295 • Found Jan 29, 2014
View case
Sex ✓Female
Age 100%Est. 18–24 vs 18 when missing
Race 100%Hispanic
Location 81%78 mi away, same state
TimingFound 2 years after last seen
Height 68%5'0" vs 5'3"–5'8"

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.