Here’s what we know so far about those killed in the Texas shooting:The Cho familyCho Kyu Song, 37 (husband) and Kang Shin Young, 35 (wife) are shown in an undated photo. William, who just celebrated his birthday, lost his mother, father and younger brother in the shooting, according to the post. Daniela and Sofia MendozaSisters Daniela and Sofia Mendoza were both elementary school students in the Wylie Independent School District, according to a letter sent to parents by the district. “Words cannot express the sadness we feel as we grieve the loss of our students,” the letter reads. “Please hold the Mendoza family close to your heart.

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