Newly detailed criminal complaints have shifted public understanding of the Del Rio killing from a general account of a group ᴀssault to a more specific sequence. According to documents obtained by reporters, Amaya “Cookie” Diaz, 19, the youngest of the three women charged, is the person police say wielded the knife. The paperwork recounts surveillance from Kyandra Renee Faz’s home on East 10th Street on June 25, 2026. Caroline “Caro” Peña, 32, is seen arriving and getting out of a black Dodge pickup.

A black Chrysler 300 then arrives. Amaya exits the front pᴀssenger seat and approaches Peña with an object investigators believed was a knife in her right hand. The two get into an altercation and Amaya is observed striking Peña in the back, after which blood appears on the back of Peña’s shirt. Kitty Mia Diaz, 21, then begins physically ᴀssaulting Peña, and Faz joins the attack. The four women later separate and leave the scene. Faz told officers Peña had come to the residence looking to start a fight and that the Diaz sisters arrived at the same time.

Friends and some early reports placed the violence near a busy intersection and a Sonic; court records tie the recorded confrontation to the residence itself. Peña was stabbed more than once, with local accounts citing wounds to the back and the side of the stomach; a friend told Spanish-language media that one wound pierced a lung and proved fatal. Her nephew drove her to Val Verde Regional Medical Center shortly after 2 p.m. Because the injuries were so serious she was taken to San Antonio, where the Bexar County Medical Examiner’s Office notified detectives at about 9 p.m. that she had died. Police arrested Kitty and Amaya around 4 p.m. without incident and Faz a short time later.

Officers wrote that the sisters had already changed out of the clothes visible on video and had recently showered. After Peña died, all three were charged with first-degree murder. Bonds totaling $15 million were set. The three requested appointed counsel. Authorities have said the victim and the accused knew each other and that the case is not believed to be a random street attack, but they have not announced a completed motive. Friends describe Peña as a mother of five who arrived without a weapon and tried to stay on her feet after she was already bleeding. A pH๏τo that flashed across a community page and was then deleted showed that blood and the other women still standing close by. The investigation is active, and prosecutors have left open the possibility of more charges as evidence is gathered.

Source: NY Post