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: 17-31402
Date Reported: August 8, 2017
VICTIM DETAILS
Name Olga Espinosa
Age 30
Gender Female
Race Hispanic/Latino
SUSPECT DETAILS
Name Alvaro Medrano
Offense Hit and Run
Cause Beaten/Battered
CASE DETAILS
Status Arrest Made
Incident location 24576 N Sunflower Rd
Edinburg Texas, 78539
Hidalgo
L.E.A HCSO

Cold Case Spotlight

A 47-year-old man has been charged with capital murder after authorities say he confessed to shooting and killing two women in rural Edinburg on Tuesday evening. Alvaro Medrano, 47, of Edcouch was charged with capital murder, a capitol felony, on Wednesday. A Hidalgo County Justice of the Peace set bond at $2 million. At about 6:48 p.m. on Tuesday, Sheriff’s deputies responded to an area near Sunflower Road in rural Edinburg in “reference to a 911 caller reporting that he had shot his wife“, according to a news release from the Hidalgo County Sheriff’s Department. Deputies located Medrano as he was walking away from the location, and detained him without incident near Farm-to-Market Road 493 and Farm-to-Market Road 2812, according to the news release. When deputies responded to the Medrano’s residence, they found two female bodies inside of a vehicle with gunshot wounds to the head. The bodies were identified as Medrano’s wife, 30-year-old Olga Espinosa, and Medrano’s mother-in-law, 52-year-old Irene Espinosa, according to the news release. Hidalgo County Sheriff’s Office investigators and Crime Scene Specialists collected evidence from the scene, including the handgun that was used in the shootings, according to the news release. After an investigation, the Hidalgo County Sheriff’s Office “learned that Medrano had streamed his confession on Facebook Live, while walking away from the crime scene,” according to the news release. Investigators are working with the Facebook Law Enforcement Compliance Department to preserve the livestream as evidence. During an interview, Medrano confessed to killing his wife and mother-in-law in a domestic disturbance due to infidelity, according to the news release. The Hidalgo County Sheriff’s Office encourages anyone who may be a victim of domestic violence to seek help from their respective law enforcement agencies.
CCR: Unknown
VICTIM DETAILS
Name Nora Conde Villalobos
Age 49
Gender Female
Race Hispanic/Latino
SUSPECT DETAILS
Name Juan Manuel Tobias
Offense Murder
Cause Unknown
CASE DETAILS
Status Arrest Made
Incident location FM 1015 and Nittler Road
Hidalgo
L.E.A Hidalgo Co. Sheriff's Office

Cold Case Spotlight

While many take the time on Veterans Day to honor those who served, one Valley family continues seeking justice for their beloved veteran. Army veteran Nora Conde Villalobos was only 49 years old when her body was discovered in a canal off FM 1015 and Nittler Road in Hidalgo County in 2017. The discovery prompted the arrest of her boyfriend, Juan Manuel Tobias, on murder charges. More than four years later, her family continues fighting for justice, adding that days like today bring back memories of their beloved veteran. "Her laugh— it was a contagious laugh. You knew that laugh anywhere," said Michelle Rodriguez-Zamarron, Villalobos' niece. "She didn't care who you were. She didn't care about your past. She didn't care if you had money. She didn't care if you were walking off the street. She treated you like anybody else." Rodriguez-Zamarron says her aunt was the kind of person who made everyone feel like they mattered. "We've always wanted from the beginning is just justice," Rodriguez-Zamarron. "Justice on her behalf since she is no longer here. We, as her family, will continue advocating for her." Rodriguez-Zamarron says the family stays strong by focusing on the positive and remembering the sacrifices Villalobos and all veterans made. "Her memory lives on every day," Rodriguez-Zamarron. "Just because she's gone, she's not forgotten. Today is just another day that we honor her and every veteran out there that gave selflessly, enlisted, and served our country." country."
CCR: 96-24404
Date Reported: August 24, 1996
VICTIM DETAILS
Name Jose Guadalupe Salinas
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Beaten/Battered
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 1/4 South of FM 2221 (HWY 107) o5n Iowa Rd
Mission Texas, 78572
Hidalgo
L.E.A Hidalgo Co. Sheriff's Office

CCR: Unknown
Date Reported: January 4, 1992
VICTIM DETAILS
Name Joseph Michael Escobedo
Age 23
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location Schmoker Road
Harlingen Texas, 78550
Cameron
L.E.A Cameron County Sheriff's Office

Cold Case Spotlight

HARLINGEN, Texas (ValleyCentral) — Always chosen for jury duty, a man went missing days before trial. His family searched across borders when his body was discovered shot multiple times in a canal. Three decades later, the murder of Joseph Michael Escobedo remains unsolved. Escobedo was a student at Texas Southmost College and a member of the Knights of Columbus, with ambitions to possibly become a teacher, according to reports at the time. The 23-year-old man said goodbye to his family for the last time as he headed out the door for a night out on January 2, 1992. The next day, Escobedo’s parents noticed their son’s absence as his bedroom seemed untouched. Growing concerned following a call from Escobedo’s boss stating he had not arrived for his shift, his father began a search. Escobedo’s father searched jails and police stations in Harlingen, Brownsville, South Padre Island, Reynosa, and even Matamoros. However, there was no trace. After waiting 24-hours, the Escobedos filed an official missing person report with the Brownsville Police Department. On January 4, 1992, Escobedo’s “bullet-riddled” body was discovered that same afternoon in a canal along Schmoker Road, outside Harlingen city limits near Valley International Airport, according to the Cameron County Sheriff’s Office. Authorities said Escobedo was shot eight times with two different weapons. Investigators spoke with Escobedo’s friends who claimed that they last saw him leaning against a car in the parking lot at the Genesis nightclub in Brownsville. Police were not able to determine whether he left by himself or whether someone picked him up. Feeling like they took a “part of [her] heart out,” Escobedo’s mother explained to investigators that her son was a good citizen. Emphasizing how much he enjoyed jury duty, as it was one of his “favorite hobbies.” The mother told reporters with the Valley Morning Star at the time that Escobedo was actually expected in court within days of his disappearance and murder. Escobedo was set to attend the trial of a county case on January 6, 1992. Lieutenant Ernesto Flores with the Cameron County Sheriff’s Office told reporters at the time that they could not find a motive. Adding that Escobedo “had a lot of friends, but few enemies.” In their son’s memory, the Escobedos planted a white rose bush under Michael’s bedroom window shortly after his death. Escobedo’s mother shared that she takes the roses that have blossomed to his grave. This case remains an open investigation. Individuals with any information on this case are asked to call the Cameron County Crime Stoppers at their hotline: (866)-350-5551 or (956)-350-5551.
CCR: 02-15529
Date Reported: June 27, 2002
VICTIM DETAILS
Name John Doe 13
Gender Unknown
Race Unknown
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Blunt Force
Location Unknown
CASE DETAILS
Status Unsolved
Incident location w. Iowa Rd on 5 mile line
Mission Texas, 78503
Hidalgo
L.E.A HCSO

CCR: 11-26645
Date Reported: June 27, 2011
VICTIM DETAILS
Name Stanley Diah
Age 51
Gender Male
Race African American/Black
SUSPECT DETAILS
Name 11-26645
Offense Murder
Cause Blunt Force
CASE DETAILS
Status Unsolved
Incident location S. Eldora Rd.
Donna Texas, 78537
Hidalgo
L.E.A Hidalgo Co. Sheriff's Office

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: Unknown
Date Reported: May 23, 1990
VICTIM DETAILS
Name Laura Guerra
Age 22
Gender Female
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 1111 W. Main Street.
RIO MOTEL
Rio Grande City Texas, 78582
Starr County
L.E.A Starr County Sheriff's Office

Cold Case Spotlight

On May 23rd, 1990, the dead body of Laura Guerra,22, was found in a wooded area across the road from the Rio Motel in Rio Grande City. The RIO MOTEL is located at 1111 W. Main Street. Investigators believe that Guerra was murdered at another location, possibly at the motel, and that her body was dumped in the wooded area. Autopsy results indicate that Guerra was killed three days earlier by a gunshot wound to the head. Several clues were followed, but the case went cold. Texas Rangers and the Starr County Sheriff’s Office have reopened this case, and are seeking the public’s help for information to help identify Guerra’s killer. Investigators believe that a possible witness may have information on this crime, and are asking for the public’s help in identifying a person known in the area, in 1990, known as "Gaston Garza," or "Mariano".
CCR: 14-38057
Date Reported: September 15, 2014
VICTIM DETAILS
Name John Doe 1
Gender Unknown
Race Unknown
SUSPECT DETAILS
Name unknown
Offense Murder
Cause Blunt Force
Location unknown
CASE DETAILS
Status Unsolved
Incident location 8800 Tex-Mex
Edinburg Texas, 78539
Hidalgo
L.E.A Hidalgo Co. Sherriff's Office

CCR: Unknown
Date Reported: April 29, 1991
VICTIM DETAILS
Name Guadalupe Lozano III
Gender Male
Race Hispanic/Latino
SUSPECT DETAILS
Name Unknown
Offense Murder
Cause Gun/Firearm
Location Unknown
CASE DETAILS
Status Unsolved
Incident location 1 mile East of the Village Hut Store on Highway 4
Brownsville Texas, 78520
Cameron
L.E.A Cameron County Sheriff's Office

Cold Case Spotlight

BROWNSVILLE, Texas (ValleyCentral) — A young man’s Saturday night out took a turn for the worst as his body was discovered a few hours later “bullet-riddled” and left for passerby’s to find. 30 years later, Guadalupe Lozano III’s murder remains unsolved with no arrests. Like many in their youth, Lozano hit the town for a night out on April 27, 1991. Lozano was last seen Sunday early morning around 2 a.m. getting into a Mercury Cougar with Mexican licenses plates along with 3 other men. Leaving a popular location at the time, the Casa Blanca Night Club in Brownsville, Lozano was never seen by the public after calling his evening a night with the other men. Cameron County Sheriff Deputies reported the body was found along Highway 4 at around 7:30 a.m. April 29, according to a report from the Valley Morning Star. Lozano’s body was discovered approximately a mile east of the Village Hut Store on Highway 4, according to a release from Cameron County Sheriff Eric Garza. Cameron County Sheriffs Office spokesperson told the Valley Morning Star that Lozano’s body was discovered with 13 bullet wounds to his head. Lozano’s body was identified through his numerous tattoos, one including his last name. Investigators later identified one of the three men as Bernabe Sosa, but have not made any arrests in the case. This case remains an open investigation. 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.