San Antonio Teen Allegedly Kills Former Classmate Over Social Media Fight

A 16-year-old high school student is facing murder charges after she allegedly stabbed two 18-year-old girls, one of them fatally, during a fight that erupted from a series of threatening exchanges on social media, according to authorities and former students.Kaitlin Leonor Castilleja died around 2 a.m. Friday from stab wounds after she and one of her former classmates, Vivian Foster, went to the suspect's house in San Antonio and got into a fight in the driveway, according to a police report.Castilleja and Foster had graduated from Madison High School, and the 16-year-old suspect, who is not being identified because she is a minor, is currently a junior there, North East Independent School District officials confirmed.According to Castilleja's friends and relatives, she and the junior had been fighting "for a while" and said that it had to do with an ex-boyfriend, Foster's brother.Marie Fernandez, Castilleja's aunt, told KENS5 she thinks her niece was "lured out there" and that the suspect's claims that her former classmates had threatened to fight her "didn't add up."Around 1 a.m. Friday, the 16-year-old called police and said the two girls assaulted her in her driveway after she got home from work.