This is incorrect (in the normal civil context), as discussed elsewhere in this thread.
But also, I'm suggesting criminally charging the individual officers, not the government. Police officers are not generally immune to criminal laws, so citation requested that they would be in this instance (it is possible, there are certainly some weird exceptions in the law for LEO, but I'm not aware of one here).
States indeed have sovereign immunity from copyright lawsuits:
> On March 23, 2020, the Supreme Court held that the provisions of the Copyright Act subjecting states to liability for infringement did not validly abrogate states’ sovereign immunity from suit. As a result, copyright owners suffering infringement by state entities cannot seek the remedies provided by the Copyright Act.
Police are typically city or county (latter are sheriffs in most states). Not specifically state government in those cases. There are state police, and usually, state highway patrol.
In that context, this action as described in the article would itself be an interesting counterargument to the SCOTUS decision / Library of Congress Copyright Office finding.
PS. Taking it back as I was proven wrong