More than two years into his tenure, a court-appointed monitor overseeing changes to the New York Police Department’s stop-and-frisk policies has found that some officers are still failing to document the encounters as required, according to a report released on Wednesday.

The Police Department has audited the number of street stops at least since 2014 to learn when officers were carrying out stops but not recording them. In its first report in July 2015, the monitor’s team discovered that the department, in a limited review, had found 17 undocumented stops.

Today, the department data shows those instances persist, the new report by the monitor, Peter L. Zimroth, says.

The undercounting of street stops highlights how difficult it is to sway attitudes inside the nation’s largest municipal police force as it shifts away from the kind of unconstitutional policing of mostly black and Hispanic New Yorkers that a federal judge in 2013 said was widespread.