BBM
I can assure you that he was involved. The comments during the press conferences show that they are trying to avoid a definitive response and are attempting to word the denials of Joe's involvement deceptively.
Joe was the Lt. in charge of "Operations " for the PD. In this role, he would have (or should have) routinely reviewed the incident in question, shortly after it occurred. When the citizen filed a complaint regarding his treatment while in custody, Joe would have been involved. When the Chief (Joe's friend & coworker for 30 years) investigated and dismissed the complaint, Joe would have been involved. When the citizen pursued his complaint to the elected officials of Fox Lake who felt it warranted an outside investigator, common sense says that Joe's role & involvement will be scrutinized closely.
Worst case scenario, I think he likely just went along with the dismissive handling of the arrestee's relatively minor complaint. The alleged rude & rough treatment is unfortunately very common, especially with those arrested for DUI. They are often rude, uncooperative, and combative. When trying remain patient and impartial, human nature can sometime trump professional discretion. Officers may become complacent and feel this is permissible because it is relatively rare for someone arrested for DUI to follow up on a complaint of this nature. They must overcome their impaired recollection, embarrassment for the arrest, and the institutional resistance that they will face.
At Fox Lake, the 3 Lieutenants hold the rank directly below the chief. Joe, as the Lt in charge of Operations, holds the position with the wide ranging responsibilities most like those of the chief. Based on this, and the effusive praise from the Mayor, former Chief Behan, and others, I would have expected the Mayor to have appointed Joe as the interim police chief after Behan was suspended. This obviously was not done. Makes me wonder what the mayor discussed with Joe the day before his death.