Who does the mob beat at the school?

Melba is attacked by several students at school.

Later, when the presence of the Screaming Eagles is decreased, the taunts, threats and harassment increase dramatically. One boy throws something akin to acid in Melba's face and she is blinded. Danny grabs Melba and rushes to rinse away the solution. Melba's eyesight returns and later, an optometrist tells Mother Lois that if Danny hadn't been there, Melba may have become blind.