A former 4th grade teacher at George de La Torre Elementary school was arrested yesterday and charged with 15 counts of "committing lewd acts and continual sexual abuse of numerous students."

The teacher, 57-year old Robert Pimentel, is accused of sexually abusing at least 20 children and one adult at the school over a 7-month period dating from September of 2011 to March of 2012. 

The LA Unified School District says they became aware of the sexual abuse allegations in March and began their investigations immediately. Both the principal of the school and Pimentel resigned in April before the district was able to fire them.

KPCC reporter Brian Watt joins the show to talk about the case.