Blair, 13, and Brooke, 11 Harber were found dead with "their hands locked together."© Facebook The girls both attended St. Rita's Catholic School in Dallas, where their mother teaches.© GoFundMe ...

Krystina Renea Haas, 35, of Tyler; June Tryon, 57, of Tyler; and Priscilla Gutierrez, 22, of Lindale; were arrested Friday by Tyler ISD police on charges of injury to child/disabled person.

According to arrest documents KLTV requested from Smith County, the charges come from video evidence of a student with Down syndrome having his hands taped together and being forced to walk in circles ...

Then, his hands were tied with packing tape, and he was forced to continue walking in circles for another 30 minutes. He then was made to stand against a wall for more than two hours.