DETROIT (AP) — A former federal prosecutor is set to release his findings in an investigation of why it took so long for General Motors to order a recall of small cars with faulty ignition switches.

The report to be released later today by Anton Valukas was paid for by GM with the promise of an “unvarnished” inquiry. It is expected to address just how high in the company knowledge of the problem reached.

Documents show that GM executives knew about the problem for at least a decade before the company recalled 2.6 million cars to repair the switches in February. During that time, at least 13 people lost their lives in crashes tied to the problem.

Valukas isn’t expected to place blame with CEO Mary Barra, who has denied knowing the details until Jan. 31. Although Valukas is expected to name names, it’s likely that he’ll find GM’s bureaucratic structure at least partly responsible.

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