A reward was being offered as the investigation continued Thursday into racist graffiti targeting African-American students at Agoura High School.
The first incident was reported over the weekend when someone spray painted hate messages on walls at the school.
By Monday, the graffiti had been removed and students and parents were not informed of what occurred.
Then on Wednesday, students arrived to find a so-called ‘hit list’ spray painted inside a campus restroom.
The list included the names of African-American students who attend the high school.
Investigators asked school officials not to alert the public about the initial incident, Las Virgenes Unified School District Superintendent Dan Stepenosky said.