Amaya Cookie Diaz

The Texas sisters who smiled in their mug shots after being arrested for murder knew their alleged victim ... and the fatal stabbing was no random attack ... law enforcement tells TMZ. Del Rio Police Chief Frank Ramirez tells us ... murder suspects Kitty Mia Diaz, her sister, Amaya Cookie,…

Two sisters were all smiles after allegedly stabbing a woman to death on a busy Texas street in broad daylight. Police in Del Rio say 21-year-old Kitty Mia Diaz and her 19-year-old sister, Amaya Cookie, along with their friend, 21-year-old Kyandra Renee Faz, were busted Thursday after they…