Valerie Strauss writes that it is time for a thorough investigation of allegations of cheating during the tenure of Michelle Rhee as chancellor.

The leaking of the “smoking memo” to John Merrow shows that Rhee apparently was informed of likely cheating but chose not to investigate it.

Many questions are unanswered: what did she know and when did she know it? What did Adell Cothorne discover when she became principal? Why did no one follow up when she reported a cheating ring? Why was Cothorne forced out and by whom?

A professional and thorough investigation would get to the bottom of this mess.

It’s time for accountability.