What to Know Joseph Ponte has worked in corrections for more than 40 years; he became commissioner of the city's DOC in April 2014

Resignation comes after reports from city's Department of Investigation that Ponte violated rules regarding personal use of city vehicles

It also comes after DOI said correction staffers were caught spying on investigators during the vehicle probe

UPDATE: Chief of NYC Jails System Announces Retirement Plans



The head of New York City's embattled Department of Correction will resign amid a series of controversies, the latest of which involved alleged misuse of city resources, sources familiar with the situation tell NBC 4 New York.



Joseph Ponte will resign Friday, a day after Democratic City Council Speaker Melissa Mark-Viverito broke with Mayor de Blasio in calling for Ponte to step down. De Blasio has defended Ponte amid the latest allegations. Deputy Commissioner Cynthia Brann will take over. She is accused of misusing her city vehicle.

Staffers were drafting Ponte's resignation speech Thursday evening, the sources said.

Ponte, whose career in corrections has spanned more than four decades, was appointed commissioner in April 2014. The Marine Corps veteran previously led the Maine Department of Corrections, where he instituted substantial reforms. It was to Maine that the city's Department of Investigation, which investigates city agencies, officers or employees for potential corruption, alleged Ponte drove a city-owned vehicle in violation of guidelines.



Other Department of Correction officials were accused of misusing their agency cars as well, including for trips to the Hamptons and Cape Cod, in the report issued by DOI late last month. The report said those personal trips cost the city thousands of dollars in gas and tolls.



On Wednesday, in calling for Ponte's resignation, Mark-Viverito said lower-level city employees have been suspended or even fired for such offenses.



At the time the report came out, a Correction Department spokesman said any rule violation was a misunderstanding and would not recur. De Blasio's office also backed Ponte, saying he had presided over "sweeping reforms" and the mayor wasn't focusing on how often he visited his family on weekends.



A week after the report on vehicle use came out, the DOI issued another report alleging Gregory Kuczinski, the deputy commissioner for the Investigation Division and Correction Intelligence Bureau, directed subordinates to spy on DOI undercover operations. Those orders came "immediately after he and other senior staff were informed that DOI was preparing a report on their improper use of vehicles," the report said.



Kuczinski was relieved of his investigation and call-monitoring responsibilities. DOI Commissioner Mark Peters had called for him to be fired. De Blasio said at the time the allegations were "serious and troubling" and that his office would work with both departments to "determine what happened and what changes must occur to ensure that it doesn't happen again."