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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 (MP39275) and 9 other sources
In the summer of 2017, a 26-year-old mother of four, Cynthia Crystal Martinez, was enjoying her first night out since the birth of her youngest child. On July 16, 2017, after attending a party, Cynthia went to the Tequila Nights Bar & Grill in Keizer, Oregon, with a friend and two men she didn't know. Because her black floral romper didn't have pockets, she had given her phone and ID to her friend for safekeeping. Her companions left the bar before she did, and a short time later, she was seen leaving alone. Security footage captured Cynthia leaving the bar with two men and getting into a van in the early morning hours. She has not been seen or heard from since that night.

The investigation into Cynthia's disappearance quickly focused on the two men with whom she was last seen. One of the men was identified as Jaime Alvarez-Olivera, who was named a person of interest in her case. The second man was not considered a person of interest. The light blue 2004 Honda Odyssey minivan they left in belonged to Alvarez-Olivera and was later found abandoned at his ex-girlfriend's apartment in Woodburn, Oregon. Authorities believe Alvarez-Olivera fled, possibly to Mexico, shortly after Cynthia vanished. It is not believed that Cynthia knew him prior to that evening. Her family, devastated by her disappearance, has pleaded for any information that could lead to her whereabouts.

Cynthia's case remains an active and open investigation, with multiple law enforcement agencies, including the Keizer Police Department and the FBI, dedicating significant resources to finding answers. Rewards have been offered for information that could lead to locating Cynthia or to the arrest of anyone responsible for her disappearance. Cynthia is described as a Hispanic female with long black hair and brown eyes, and she has numerous distinctive tattoos. At the time she went missing, she was a loving mother to four young children, the youngest being only a few months old. The circumstances surrounding her disappearance point to possible foul play, and her family continues to hold out hope for her return while navigating the profound loss of her absence.

Last Seen: Jul 16, 2017

Possible Unidentified Matches (1)

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.

84%Moderate
Jane Doe — Portland, Oregon - unidentified case UP105256
Jane Doe — Portland, Oregon
UP105256 • Found Apr 24, 2023
View case
Sex ✓Female
Age 100%Est. 28–42 vs 26 when missing
Race 100%Hispanic
Location 92%39 mi away, same state
TimingFound 6 years after last seen
Height 100%5'1" vs 4'8"–5'4"
Weight 100%135 lb vs 120–140 lb
Hair 100%Black vs Black
Eyes 100%Brown vs Brown

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.