Oakland Co. and Oxford board call for independent investigation into Oxford attack

Steve Huber, spokesman for Bouchard, confirmed the sheriff's attendance on Tuesday, adding: “As we have said many times, we will attend all debriefings of the action.”

The News reported that Bouchard's office declined to participate in such a review as Coulter's office requested in January, according to Coulter's spokesman and a contemporaneous email from a county Homeland Security official. The sheriff's office denied that it declined to participate in the third-party review.

Coulter had initiated and supported the investigation, which is typically conducted by an outside agency to gain insight into the actions of the coordinating police agency and its partners in the event of a mass shooting.

Maj. Christopher Wundrach, a senior commander at Bouchard, had previously told The News that the office and staff had been fully involved in the independent investigation by Guidepost Solutions, but that investigation and accompanying report were limited to examining the school district's role and response to the attack – not that of emergency responders.