President Donald Trump’s nominee to head the U.S. Department of Agriculture says efforts by the U.S. Forest Service to fight wildfires in California shouldn’t be influenced by politics.

The shooter was “significantly influenced by web-based material, especially that found on non-traditional sites that most would find harmful and objectionable,” police said.

The investigation into why a Nashville high school student fatally shot a classmate before killing himself has centered on his online writings, which authorities describe as concerning warning signs.