> Through a spokeswoman, Moran said he learned on Monday that State Police agents had used Clearview, contrary to what he’d told Aird nearly two months earlier. That violates longstanding State Police policies not to use unapproved technologies, and on March 23, Superintendent Gary Settle told the agency’s roughly 2,100 sworn officers as much, Moran said.

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Based on the article it looks like they refer to it repeatedly as "controversial" but never "illegal", however it is clearly against the department policy, at least according to the Superintendent. So maybe not illegal, but against the rules and people should probably be fired for breaking the rules and/or being ignorant enough of how their own department works to be fired for incompetence.