Inside the Twisted ‘Smiling Sisters’ Broad Daylight Slashing of a Texas Mother of Five.
A quiet border city in Texas has been rocked to its core by a crime so brazen, so callous, and so calculated that it has triggered a firestorm of outrage across the nation. A bubbly, beloved 32-year-old mother of five was savagely knifed to death on a busy residential street in broad daylight. But it isn’t just the daylight ambush that has the internet boiling with fury—it is the chilling behavior of the suspects in the minutes and hours following the bloodshed.
They didn’t hide. They didn’t panic. According to police documents, they went home, showered, washed the blood from their clothes, and later smiled and joked for the cameras as they were led away in handcuffs.
Dubbed by the internet as the “Smiling Sisters,” Amaya “Cookie” Diaz, 19, and Kitty Mia Diaz, 21, along with their 21-year-old friend Kyandra Renee Faz, are currently locked behind bars. Each faces a staggering $5 million bond, totaling a massive $15 million combined bail for the trio accused of ending a mother’s life.
The Broad Daylight Ambush Captured on Camera
The horror unfolded on Thursday, June 25, in Del Rio, a tight-knit community of about 35,000 residents situated two hours west of San Antonio. The victim, Caroline “Caro” Peña, was a dedicated mother whose world revolved around her five children, including a 17-year-old son on the cusp of high school graduation.
According to a newly revealed probable cause arrest affidavit, investigators didn’t have to guess what happened. The entire fatal encounter was captured on a nearby home surveillance doorbell camera.
The footage reveals a calculated confrontation. Caro Peña pulled up to a residence in the 800 block of East 10th Street in her black pickup truck. Moments later, a black Chrysler rolled up. Out stepped the Diaz sisters, moving directly toward Peña.
The police narrative states that Amaya “Cookie” Diaz was observed holding an object in her right hand—believed to be a knife. Within seconds, the encounter turned deadly. “Cookie” allegedly struck Peña in the back, right where blood immediately began soaking through the victim’s shirt.
But it was a pack attack. Kitty Diaz and Kyandra Faz allegedly lunged in next, physically assaulting a defenseless Peña out in the open. Autopsy findings show Peña was stabbed three times—twice in the back and once in the stomach.
“This wasn’t something that happened in a back alley,” Zelina Ochoa, Peña’s heartbroken childhood friend, told local reporters. “This happened at the corner near Sonic on one of our busiest roads in broad daylight.”
The Unhinged Timeline: Rinsing Off the Crime
While surgeons at a San Antonio hospital desperately fought to save Peña’s life, detectives moved with lightning speed. Within just two hours of receiving the hospital alert, officers tracked the Diaz sisters to a home on the other side of town. Parked outside in the driveway was the black Chrysler.
When officers entered the home, what they discovered left seasoned investigators stunned.
On the surveillance video, Kitty had been wearing a pink tank top and Cookie was in a red tank top. But inside the home, both sisters had completely changed outfits. Officers noted that both women had recently showered—their hair was still noticeably wet.
A further search of the property uncovered the ultimate act of concealment: the clothes Kitty had worn during the stabbing were found stuffed inside a washing machine, drowning the evidence. This discovery slammed Kitty Diaz with an additional, heavy felony charge: tampering with physical evidence.
Social Media Outrage: The Unbothered Arrest
What has truly sent shockwaves through X (formerly Twitter), Reddit, and TikTok is the jaw-dropping arrest footage. Escorted by Del Rio police officers to patrol cars in the sweltering Texas heat, the Diaz sisters looked like they were exiting a VIP party rather than a crime scene.
Kitty turned to the camera lens, grinning broadly and joking. Cookie smirked, stuck out her tongue, and looked completely unbothered.
True crime communities on Reddit have gone wild analyzing the behavior. “The lack of empathy is psychopathic,” one user wrote in a thread that gained thousands of upvotes. “They were laughing while a mother of five was literally taking her last breaths in a hospital.” Indeed, the timeline confirms this haunting reality: when the sisters were mocking the cameras at 4:00 PM, Caro Peña was still alive, fighting for survival. She was not pronounced dead until 9:00 PM that night.
Compounding the tragedy, internet sleuths dug into Kitty Diaz’s social media feeds, finding a sickening double standard. On her profiles, Kitty frequently posted doting videos of her own 4-year-old son, calling him her “entire world” and her “reason for everything.” That same 4-year-old toddler was present in the home when police raided it to arrest his mother for slaughtering another child’s mom.
The Legal Battleground Ahead
While the public demands immediate justice, the legal wheels are just beginning to turn in Val Verde County. Despite the fierce community backlash, court records indicate that the three suspects have been charged but not yet formally indicted by a grand jury.
Legal experts point out that while Amaya “Cookie” Diaz is accused of holding the physical blade, Kitty Diaz and Kyandra Faz face identical murder charges due to Texas’s strict “Law of Parties.” Under this statute, if individuals act in collaboration to commit a crime, every participant shares equal legal liability and exposure, regardless of who delivered the fatal blow.
Furthermore, analysts agree that the viral video of the sisters laughing will act as a prosecutor’s dream. While a jury cannot convict on behavior alone, the visual demonstration of absolute malice and zero remorse will be near-impossible for defense attorneys to overcome.
A Grieving Community Remembers “Caro”
The motive for the horrific melee remains a tight-lipped secret. Del Rio Police Chief Frank Ramirez confirmed to media outlets that the victim and the suspects definitely knew each other, ruling out a random stranger attack. However, investigators have yet to publicize what sparked the deadly grudge.
As the suspects sit on their multi-million-dollar bonds, the city of Del Rio is rallying around the five children left behind. Mourners describe Peña as a woman who “was born to be a mom,” a loyal friend with an infectious laugh that could fill any room.
“Those girls are in jail. Eventually they’ll see their kids, but Caro is a memory now,” her childhood friend Zelina Ochoa lamented. “Those kids were left without a mom.”
The case continues to develop as prosecutors prepare their presentation for the grand jury. One thing is certain: the nation is watching, and the community will not let the memory of Caro Peña be forgotten.