A fourth staffer at a Los Angeles elementary school is under investigation for inappropriate conduct with a student after the boy's mother went public with a classroom aide's love letters to her fourth grade son.

The Los Angeles Unified School District confirmed to ABC News today that Areceli Luisjuan, a teacher's aide, was investigated for writing the letters to the boy in 2009.

On Monday, a third teacher was accused by attorney Brian Claypool, who represents three alleged victims, of delivering students to Brendt for sexual abuse.

(Davis) previously represented three kindergarten-aged students from Miramonte who pressed charges against Ricardo Guevera, a teacher who was eventually convicted of molesting the girls and sentenced to 15 years to life in prison.

Miramonte Elementary School is located in unincorporated South Los Angeles within the Florence-Firestone area. We are an urban school serving a minority community that is predominantly Hispanic.

Miramonte’s kindergarten through 6th grade programs service 1,396 students, of which 98% are Hispanic and 2% African-American. 56% of the students are English Language Learners and about 1% of the students are considered migrant students.

100% of our students receive free/reduced price meals under the Federal School Lunch program.