The North Carolina man visited by armed EPA agents after sending an email to a controversial agency official says he not satisfied with the explanations about what he considers an excessive response and that he wants changes to agency policies and procedures.

“This isn’t over,” Keller said.

He told Fox that Environmental Protection Agency officials have said the agency followed procedures and that the agents acted appropriately during their visit last month. However, Keller is still invited to come to EPA headquarters to discuss the situation.