Rochester’s public integrity office said Tuesday it found no ethical lapses in the way Mayor Lovely Warren or senior staff members responded to the case of Daniel Prude, whose death in police custody led to weeks of protests and calls for Warren’s resignation.

The Office of Public Integrity conducted a narrow review of what the mayor and a handful of others knew about Prude’s death and when to determine whether they violated city policy or ethical standards. The office does not have authority to investigate sworn police officers.

The 54-page report largely corroborates Warren’s claims that she only became aware that Prude’s death in March involved the use of force when she was shown police body camera video on Aug. 4. She said then-Police Chief La’Ron Singletary, whom she later fired, initially misrepresented it as a drug overdose.

The OPI findings were based on interviews with Warren, Deputy Mayor James Smith, Communications Director Justin Roj and Corporation Counsel Timothy Curtin, who were the focus of the review, as well as reviews of email and city issued cellphones.