Riverside police say the second victim came forward after the YouTube video surfaced of the first alleged victim, identified as Jamie.
Jamie accused Andrea Cardosa, an Alhambra school administrator and former Riverside teacher of sexual abuse. She said Cardosa had sexually abused her for years beginning at the age of 12.
The Riverside School District has since confirmed Cardosa was a temporary status teacher at Chemawa Middle School in Riverside.
She resigned in 1999, but the school district says they can't say why. That's around the same time Jamie says she was molested.
Jamie recorded her confrontation with Cardosa and posted it on YouTube Friday.
"I just wanted to help you," Cardosa says in the video. "How is having a sexual relationship with a 12-year-old student helping?" Jamie replies.
Cardosa resigned from her post at Alhambra High School after a meeting with school officials on Friday. She has not been charged with any crimes.