Rio Grande Valley Friends and Families of Murdered Children

Proudly Introduces the RIO PROJECT COLD CASE HOMICIDE DATABASE: A Regional Initiative to Spotlight Unsolved Murders and Amplify the Voices of Victims and Their Families

The Rio Grande Valley Families and Friends of Murdered Children (RGV-FFOMC) is honored to announce the launch of the Rio Project Cold Case Homicide Database—a first-of-its-kind initiative designed to centralize and bring public attention to unsolved homicide cases throughout the Rio Grande Valley. This comprehensive and publicly accessible database will be a powerful tool for elevating awareness, supporting grieving families, and encouraging renewed investigative efforts.

Phase I – County Coverage:
The initial rollout will include unsolved homicide cases submitted from the following four counties:
  • Hidalgo County
  • Cameron County
  • Starr County
  • Willacy County

Each entry will be verified and submitted by either:
  • Local law enforcement agencies, or
  • Surviving family members seeking to keep their loved one’s memory alive and case visible.
RGV-FFOMC plans to expand the database to include additional counties across the region as resources allow.

Why This Matters:
Keeping a homicide victim’s case in the public eye not only honors their memory but also increases the likelihood of generating new leads, witnesses, or information that may help bring justice—visibility matters. Awareness saves cases.

How to Submit a Case:
Families or law enforcement agencies wishing to submit an unsolved homicide case for inclusion may do so by completing the official Case Summary -
Cold Case Submission - Google Forms

Submission Form
. Submission does not guarantee immediate inclusion; all entries are subject to verification and review.

⚠️ Please Note:

Rio Project Cold Case is not a private investigative service. This initiative is strictly for public awareness and advocacy purposes. All investigative matters remain under the jurisdiction of the appropriate law enforcement agencies.

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167 cases found.
CCR: 03-25018
Date Reported: October 15, 2003
VICTIM DETAILS
Name Unknown
Gender Unknown
Race Unknown
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Unknown
Location Unknown
CASE DETAILS
Status Unsolved
Incident location west of Iowa road
L.E.A Hidalgo County Sheriff's Office

CCR: Unknown
Date Reported: October 9, 1984
VICTIM DETAILS
Name Kim Sue Leggett
Age 21
Gender Female
Race Caucasian/White
SUSPECT DETAILS
Name Unknown
Offense Missing Person (Presumed Murdered)
Cause Other
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 2364 Mile 12 N.
Ross Cotton Gin
Mercedes Texas, 78570
Hidalgo County
L.E.A Mercedes Police Department

Cold Case Spotlight

On 10-09-1984 between 4:30 PM and 4:45 PM, 21-year-old Kim Sue LEGGETT was abducted from the Ross Cotton Gin in Mercedes, Texas, where she worked as a secretary. Mrs. LEGGETT was last seen in the company of two unknown males. Mrs. LEGGETT's father received a ransom telephone call from an unidentified male within a few minutes of her kip/abduction. A few days later, her mother and father received another ransom letter via mail. Neither the telephone call or the message was followed up by the kidnappers. Mercedes Law Enforcement investigators presume that Mrs. LEGGETT was murdered by her kidnappers and her body has never been recovered. Mrs. LEGGETT left behind her husband and a young son along with her immediate family. She has Blonde hair, blue eyes. Leggett has a scar on her chin. Her both ears are pierced. No Justice. No Peace.
CCR: 95-10363
Date Reported: April 18, 1995
VICTIM DETAILS
Name Serge Luis Trevino
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Knife/Stabbing
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 6 3/4 N. Shary Rd.
Mission Texas, 78574
Hidalgo
L.E.A Hidalgo Co. Sheriff's Office

CCR: 92-11150
Date Reported: May 25, 1992
VICTIM DETAILS
Name Jesus J. Sosa
Age 37
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Blunt Force
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 1/4 North of Exp. 83 on Valverde Rd.
Donna Texas, 78537
Hidalgo
L.E.A Hidalgo Co. Sherriff's Office

CCR: 94-11998
Date Reported: May 10, 1994
VICTIM DETAILS
Name Unknown
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name unknown
Offense Murder
Cause Blunt Force
Location unknown
CASE DETAILS
Status Unsolved
Incident location 1 mile E of tower on Owassa
L.E.A Hidalgo County Sheriff's Office

CCR: Unknown
Date Reported: March 18, 1990
VICTIM DETAILS
Name Paulo Benavidez
Age 30
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Offense Murder
Cause Gun/Firearm
CASE DETAILS
Status Unsolved
L.E.A Cameron County Sheriff's Dept

Cold Case Spotlight

BROWNSVILLE, Texas (ValleyCentral) — Bystanders called authorities when they found a vehicle on the side of the road; headlights still on and motor still running. Inside the vehicle, deputies found a man with a gunshot wound to his head. Over 30 years later, the case remains unsolved. On Thursday, March 18, 1990, authorities received a call about a suspicious vehicle on Charmaine Lane in Brownsville. The car was a brown Thunderbird with Florida license plates. The vehicle’s motor was still running with its headlights on when authorities arrived. Deputies approached the vehicle and found 30-year-old Paulo Benavidez slumped over the steering wheel, lifeless. He had a gunshot wound to his head from what former Sheriff Alex Perez called “a large caliber gun.” Anyone with information on the case is asked to contact the Cameron County Crime Stoppers at (956) 350-5551.
CCR: 01-19446
Date Reported: September 14, 2001
VICTIM DETAILS
Name Unknown
Gender Unknown
Race Unknown
SUSPECT DETAILS
Name Unknown
Offense Suspicious Death
Cause Unknown
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 13 1/2 miles north Conway
L.E.A Hidalgo County Sheriff's Office

CCR: 01-7299
Date Reported: April 8, 2001
VICTIM DETAILS
Name Unknown
Gender Male
Race Caucasian/White
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Unknown
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 3 1/2 West Road and 19 North Road
Elsa Tx , 78543
L.E.A Hidalgo County Sheriff's Office

CCR: Unknown
Date Reported: October 18, 1988
VICTIM DETAILS
Name Eduardo A. Cuellar
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location Cameron County
L.E.A Cameron County Sheriff's Office

Cold Case Spotlight

CAMERON COUNTY, Texas (ValleyCentral) — A knock on the door from a stranger lead to the abduction and murder of a local man. 33 years later, the murder of Eduardo A. Cuellar remains unsolved with no arrests. On October 18, 1988, at approximately 6 p.m. two men arrived at Cuellar’s front door asking for him by name. Cuellar approached the men outside his home when a man put a gun against his rib cage area and forced Cuellar into a black Chevy Balzer where a third man was waiting. The gunman was described as a Mexican man with a mustache wearing a baseball cap, weighing approximately 160 pounds with a height of 5 feet 6 inches, and is estimated to be around 30 years old, according to the Cameron County Sheriffs Office. Family members of Cuellar followed the Chevy from a distance. The vehicle turned around after Cuellar’s body had already been left on the side of the road with multiple gunshot wounds. Investigators say the suspect’s last name may be “Leal” or “Lopez.” This investigation remains active and unsolved. If you have any information on this case, please call the Cameron County Crime Stoppers at their hotline: (866)-350-5551 or (956)-350-5551.
CCR: 88-6582
Date Reported: April 17, 1988
VICTIM DETAILS
Name Unknown
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknow
CASE DETAILS
Status Unsolved
Incident location Basleline Road
L.E.A Hidalgo County Sheriff's Office