The Colorado Department of Education says it mistakenly left the Arapahoe High School shooting out of an official accounting of disciplinary action.
But that early version had formatting errors, says department spokeswoman Megan McDermott. "We were trying to meet the needs of a news outlet as quickly as we could," McDermott says. "It was our error; it's not the fault of anyone else."
Column headings were incorrect on the provided spreadsheet, she says.
"It seems to me that it’s something that we need to clarify further, so that parents and students have a clearer picture of what’s going on in the schools that they’re attending," Lawrence says.
The shooting claimed the life of 17-year-old Claire Davis. The gunman, 18-year-old Karl Pierson, killed himself shortly after.
The school violence reporting law was created after 1999's Columbine High School shootings.
The Associated Press contributed to this report.
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