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: 03-31820
Date Reported: December 31, 2003
VICTIM DETAILS
Name John Doe 6
Gender Male
Race Caucasian/White
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Blunt Force
Location Unknown
CASE DETAILS
Status Arrest Made
Incident location F.M. 493 & 12 1/2 N. E. on Victoria Rd.
Donna Texas, 78537
Hidalgo
L.E.A Hidalgo Co. Sherriff's Office

CCR: 89-08624
Date Reported: June 2, 1989
VICTIM DETAILS
Name Juan Jose Marquez
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 1/10 Mile S. of Rancho Toluca Rd. on Mile 3
Weslaco Texas, 78596
Hidalgo
L.E.A Hidalgo Co. Sherriff's Office

CCR: Unknown
Date Reported: October 18, 2017
VICTIM DETAILS
Name Rosvel Garza
Age 19
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Missing Person (Presumed Murdered)
Cause Unknown
Location Unknown
CASE DETAILS
Status Unsolved
Incident location La Sagunada Road near Farm-to-Market Road 755
Rio Grande City Texas, 78582
Starr County
L.E.A Starr County Sheriff’s Office

Cold Case Spotlight

The Starr County Sheriff’s Office along with Texas Rangers are asking for the public’s help in locating two missing brothers. On, Mario Alberto Garza, 17, and Rosvel Garza, 19 brothers were reported missing by their family. The two brothers were last seen by friends on October 18, 2017, in a gray Dodge Dakota extended cab pickup. Through the investigation, it was discovered that the vehicle, 2005 Dodge Dakota, was found abandoned and burnt in the woods near La Sagunada Road near Farm-to-Market Road 755. Anyone with information or knows the whereabouts of Mario Alberto Garza and Rosbel Garza are encouraged to contact the Starr County Sheriff’s Office at (956) 487-5571.
CCR: 88-20798
Date Reported: December 16, 1988
VICTIM DETAILS
Name Charles McCumber
Gender Male
Race Caucasian/White
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location E. of Mile 2 1/2 E. Mile 6 3/4 N.
Mercedes Texas, 78570
Hidalgo
L.E.A Hidalgo Co. Sheriff's Office

CCR: 15-48120
Date Reported: December 2, 2015
VICTIM DETAILS
Name Patricia Aevedo Chavez
Gender Female
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 12927 Santawan
Mercedes Texas, 78570
Hidalgo
L.E.A Hidalgo Co. Sherriff's Office

Patricia A. Chavez was fatally shot in her home on December 2nd, 2015 at approximately 8:50 pm in Mercedes, Texas.
CCR: 11-39412
Date Reported: September 18, 2011
VICTIM DETAILS
Name John Doe 7 AKA: Niero
Gender Unknown
Race Unknown
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Blunt Force
Location Unknown
CASE DETAILS
Status Unsolved
Incident location San Bernardino Dr.
Alamo Texas, 78516
Hidalgo
L.E.A Hidalgo Co. Sheriff's Office

CCR: 2014-00008696
Date Reported: February 4, 2014
VICTIM DETAILS
Name Arturo Hinojosa
Age 32
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name 23-year-old Joseph Espinoza 23-year-old Hector Nicolas Medina-Castillo and Luz Aurora Rivera-Ibarra
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 4800 block of La Vista Avenue
McAllen Texas, 78501
Hidalgo County
L.E.A McAllen

Cold Case Spotlight

On Authorities are asking for the public's help in finding three people who have been identified as suspects in connection to a deadly weekend home invasion in McAllen. A home invasion off the 4800 block of La Vista Avenue left Arturo Hinojosa and David Means dead on Saturday night. McAllen police reported on Tuesday morning that three suspects have been identified. Investigators are looking for 23-year-old Joseph Espinoza on murder and aggravated robbery charges. Espinoza was last seen driving a 2008 Chevrolet Tahoe. McAllen police also reported that 23-year-old Hector Nicolas Medina-Castillo is also wanted on murder and possession of marijuana charges. A third suspect identified as 23-year-old Luz Aurora Rivera-Ibarra is wanted on a possession of marijuana charge. Investigators say two more suspects only known by their nicknames "El Cholo" and "Boxer" still need to be identified. Anyone with information about the suspects or the case is asked to call McAllen Crime Stoppers at (956) 687-TIPS or (956) 687-8477
CCR: 91-03917
Date Reported: March 14, 1991
VICTIM DETAILS
Name Edgar Ricardo Carrillo
Age 29
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name unknown
Offense Murder
Cause Gun/Firearm
Location unknown
CASE DETAILS
Status Unsolved
Incident location E. SH 107
Edinburg Texas, 78539
Hidalgo
L.E.A Hidalgo Co. Sherriff's Office

CCR: Unknown
Date Reported: February 15, 2017
VICTIM DETAILS
Name Jose Guadalupe Martinez
Age 50
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 2485 Military Highway
Brownsville Texas, 78520
Cameron
L.E.A Brownsville Police Dept.

Cold Case Spotlight

BROWNSVILLE, Texas (ValleyCentral) — Jose Guadalupe Martinez was found murdered in his office in 2017. Investigators have been able to narrow the timeline of when he was killed, but the case still remains unsolved. At 7:49 p.m. on March 15, 2017, officers responded to Milo’s Tire Shop, located at 2485 Military Highway in Brownsville after a body was found. A man discovered the body, and went to a neighbor who was close by. When the two returned, a third man was there at the scene. The three men then called police and waited for officers to arrive. Upon arrival, officers found Martinez face down, in a pool of blood in his office. He had a gunshot wound to his head, and investigators found one bullet casing at the scene. The man who originally discovered Martinez’ body arrived at the store at 7:35 p.m. to pay for some rims he had purchased. Investigators at the scene later found a receipt Martinez had from a purchase at a dollar store at 7 p.m. that same day. With this information, they were able to determine that Martinez was murdered at some time between 7 p.m. and 7:35 p.m. However, Brownsville police said they have “no leads whatsoever,” with the case.
CCR: 92-23522
Date Reported: October 19, 1992
VICTIM DETAILS
Name Unknown
Gender Unknown
Race Unknown
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Unknown
Location Unknown
CASE DETAILS
Status Unsolved
Incident location south side of bus. 83 on Hutto Rd.
L.E.A Hidalgo County Sheriff's Office