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: 91-01339
Date Reported: January 28, 1991
VICTIM DETAILS
Name Unknown
Gender Male
Race Caucasian/White
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Unknown
Location Unknown
CASE DETAILS
Status Unsolved
L.E.A Hidalgo County Sheriff's Office

CCR: Unknown
Date Reported: August 1, 1991
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 1/8 north of, 6 1/2 north of, 6 1/2 west
L.E.A Hidalgo County Sheriff's Office

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

CCR: Unknown
Date Reported: September 26, 1988
VICTIM DETAILS
Name Michael Flores
Age 15
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 201 Forrest Street
Rio Hondo Texas, 78583
Cameron County
L.E.A Rio Honodo Police Department

Cold Case Spotlight

On September 26, 1988, at approximately 9:30 PM, Michael Flores returned to his home, 201 Forrest Street in Rio Hondo, after attending band practice. Michael went into his bedroom and began listening to the radio. The occupants of the home heard a gunshot and went to Michael’s bedroom. They found Michael in his bedroom slumped over with a gunshot wound. The shot came from outside the bedroom and struck Michael. Michael was pronounced dead at the scene. No Justice. No Peace.
CCR: Unknown
VICTIM DETAILS
Name Efren "Pipo" Quiroz Jr.
Age 33
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Fidencio Castillo
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location Expressway 83 and Val Verde Road
Donna Texas, 78537
Hidalgo
L.E.A Donna Police Department

Cold Case Spotlight

DONNA – Police are searching for a 38-year-old suspect involved in a fatal shooting. The incident happened at a Stripes Store on Expressway 83 and Val Verde Road. Donna Police Cpt. Rick Suarez told CHANNEL 5 NEWS 35-year-old Efren Quiroz Jr., of Alamo, was shot Saturday night. He said the suspect, identified as Fidencio Castillo, zeroed in on the victim while he walked out of the store. He fired a couple of shots at Quiroz, hitting him once in the back, according to Suarez. Police issued out a warrant to arrest Castillo on murder charges. Suarez says on Monday, officers and U.S. Marshals searched his Alamo residence. Police say the crime doesn't appear to be random. Both the suspect and victim are believed to have known each other. Authorities are also looking for a 2008 Dodge Ram with license plate number, KCF-3128. If you have any information, you're asked to call Donna Crime Stoppers at 464-8477. If the tip leads to an arrest, you're eligible for a $1,000 reward.
CCR: 02-16480
Date Reported: July 9, 2002
VICTIM DETAILS
Name John Doe 8
Age 58
Gender Male
Race Caucasian/White
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Unknown
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 9 1/4 north of Bentson Palm rd. south of Serenidad Ave.
L.E.A Hidalgo County Sheriff's Office

CCR: Unknown
Date Reported: May 12, 2005
VICTIM DETAILS
Name Reynaldo Castaneda
Age 52
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Blunt Force
Location Unknown
CASE DETAILS
Status Unsolved
Incident location Mile 10 N and Mile 1 W
Mercedes Texas, 78570
Hidalgo
L.E.A Hidalgo Co. Sheriff's Office

Cold Case Spotlight

When deputies arrived, they discovered the bodies of 52-year-old Reynaldo Castaneda and 74-year-old Alberto Castaneda. Newspaper archives indicate that the men were a father and his son. 74-year-old, Alberto Castaneda At the time, authorities said there was clear evidence of foul play. In January 2021 the Hidalgo County Sheriff’s Office asked anyone with information about the double homicide to come forward.
CCR: 09-18424
Date Reported: May 11, 2009
VICTIM DETAILS
Name Benjamin Soto
Age 29
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name unknown
Offense Murder
Cause Blunt Force
Location unknown
CASE DETAILS
Status Unsolved
Incident location N. Mile 8 on Moorefield Rd.
Alton Texas, 78573
Hidalgo
L.E.A Hidalgo Co. Sherriff's Office
CCR: Unknown
Date Reported: March 23, 2016
VICTIM DETAILS
Name Oneida Alanis Balderas Garza
Age 44
Gender Female
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 200th block of Ebony Court
Rio Grande City Texas, 78582
Starr County
L.E.A Rio Grande City Police Department

Cold Case Spotlight

It was around 9:30 am on March 23rd when the bodies of two Rio Grande City CISD employees were found inside the residence of Garza located on the 200th block of Ebony Court. Lourdes M. Elizondo (33) and Oneida Alanis Balderas Garza (44) had been shot execution style with their hands bound. Both women worked in the Business Office of the school district
CCR: 01-29165
VICTIM DETAILS
Name Hector H Camacho
Age 49
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Blunt Force
Location Unknown
CASE DETAILS
Status Unsolved
Incident location Alberta Rd. & Tower Rd.
Edinburg Texas, 78539
Hidalgo
L.E.A Hidalgo Co. Sheriff's Office