Koby Levin of Chalkbeat reports that a study of the state takeover of Detroit’s public schools–which lasted for 15 years–was “a costly mistake.”

The state was supposed to solve intractable problems that elected school officials in Detroit could not.

It made things worse, according to a newly released report on the 15 years during which the Detroit school district was largely controlled by state-appointed officials.

The study, which was commissioned by the current school board, found a pattern of “startling mismanagement” in academic and financial matters whose consequences continue to weigh on the district’s future.

While some had hoped that the report would eventually lead to a lawsuit against the state, that seems unlikely. Instead, it provides a 172-page confirmation of what many Detroiters have argued for years: that installing state officials in place of the elected school board wasn’t enough to make the district’s problems disappear.

“The legacy of…