The second case contained a complaint from the university student, but the file did not include the original body camera recording.
The third case contained an allegation of physical contact and a reference to nearby security footage. The footage had never been requested.
Mercer continued through the remaining files.
Some had been handled appropriately based on the information available. Others contained clear gaps.
He noticed that several complaints had been categorized according to the officer's explanation rather than the evidence that could have independently verified the complainant's account.
In some cases, the officer's statement was treated as sufficient to close the complaint.
In others, the absence of video evidence was used to justify closure even though the department had not attempted to obtain the available footage.
Mercer prepared a list of questions for Lieutenant Reynolds.
Daniel Mercer: "When you received a complaint involving Officer Brooks, did you have a standard process for checking whether previous complaints raised similar concerns?"
Lieutenant Reynolds: "We reviewed the individual incident."
Daniel Mercer: "But did you compare it with earlier allegations?"
Lieutenant Reynolds: "Not through a formal process."
Daniel Mercer: "Were you aware that multiple people had described similar behavior?"
Lieutenant Reynolds: "I was aware of some concerns."
Daniel Mercer: "What did you do with that information?"
Lieutenant Reynolds: "I spoke with the officer on a few occasions."
Daniel Mercer: "Where are those conversations documented?"
Reynolds looked through his notes.
Lieutenant Reynolds: "Some were informal."
Daniel Mercer: "Then how can the department establish what was discussed or whether the officer was instructed to change his conduct?"
Lieutenant Reynolds: "I can't provide a record of every conversation."
Daniel Mercer: "That is precisely the concern. Supervisory intervention must be documented if the department expects to evaluate whether it worked."
Reynolds looked down at the table.
Daniel Mercer: "Did you ever request additional training for Brooks after the complaints?"
Lieutenant Reynolds: "I believe he attended general training."
Daniel Mercer: "Was any of that training specifically related to the complaints?"
Lieutenant Reynolds: "I don't recall."
Mercer closed the folder.
Daniel Mercer: "The department cannot rely on a general assumption that an officer has been trained. It needs to establish whether specific concerns were identified, whether corrective action was taken, and whether the officer's conduct improved."
The interview ended.
Mercer continued reviewing the records over the following days. He also interviewed several employees who had worked in the complaint review process.
By the end of the review, he had identified recurring weaknesses.
The department had not consistently compared complaints involving the same officer.
Evidence was not always collected when witnesses or surveillance footage had been identified.
Some supervisors had closed complaints without documenting why additional investigation was unnecessary.
Informal counseling had not been recorded consistently.
There was no reliable mechanism to alert command staff when repeated allegations involved similar behavior.
Mercer included these findings in an independent report.
The report did not conclude that all eleven previous complaints were valid. It did conclude that the department had failed to investigate several of them adequately and had missed opportunities to identify a possible pattern.
The distinction mattered.
A complaint could be unsubstantiated because the available evidence did not support it. But a complaint could also remain unresolved because the department had failed to collect the evidence that might have clarified what happened.
Those were not the same thing.
When Chief Thomas Whitaker received the report, he arranged an emergency meeting with the command staff.
Captain Brooks, Detective Bennett, Lieutenant Reynolds, and the department's legal adviser attended.
Chief Whitaker placed the independent report on the table.
Chief Whitaker: "We now have two separate findings. First, the current incident involved serious misconduct by Officer Brooks. Second, our independent review identified weaknesses in how previous complaints were handled."
Captain Brooks: "That's correct."
Chief Whitaker: "I want to understand whether the failures were limited to one supervisor or whether the process itself was inadequate."
Daniel Mercer: "The review identified both individual supervisory shortcomings and broader procedural weaknesses."
Chief Whitaker: "Explain the broader weaknesses."
Daniel Mercer: "The department did not have a sufficiently reliable process for identifying repeated allegations involving the same officer. Evidence collection was inconsistent, and some complaint closures lacked adequate documentation."
Chief Whitaker: "Could those failures have allowed repeated conduct to continue without intervention?"
Daniel Mercer: "They created that risk. The records show that several warning signs were not examined together."
The chief turned toward Reynolds.
Chief Whitaker: "Lieutenant, you supervised Brooks. Why did you not identify the repeated concerns?"