NEW YORK (AP) — The head of New York City’s public schools system, David Banks, said Tuesday that he will step down at the end of the calendar year, becoming the latest high-ranking departure from Mayor Eric Adams’ administration amid escalating federal criminal investigations.

The decision comes weeks after federal agents seized Banks’ phones, as well as devices belonging to the city’s police commissioner, two deputy mayors and a top Adams adviser. The police commissioner, Edward Caban, resigned earlier this month.

In a retirement letter shared with The Associated Press, Banks said he had already informed the mayor of his decision to retire this year “after ensuring the school year got off to a good start.”

A former teacher, principal and founder of a network of all-boys public schools, Banks has led the city’s public school system since Adams took office in 2022.

The resignation letter made no reference to the multiple ongoing federal investigations involving senior Adams aides, relatives of those aides, campaign fundraising and possible influence peddling.

Adams said in a statement he was “immensely grateful and proud” for what Banks had achieved over his years leading the school system.

Banks’ brother, Philip, is a former police officer who now serves as the city’s deputy mayor for public safety. Their brother Terence, a former supervisor in the city’s subway system, has been running a consulting firm that promised to connect clients with top government stakeholders.

Earlier this month, federal investigators seized David and Philip Banks’ cellphones. Several other high-ranking city officials also had their devices taken, including Caban.

David Banks shares a home in Harlem with his partner, Sheena Wright, the first deputy mayor whose devices were also seized. He previously declined to talk about the search, telling reporters: “I can’t answer those questions.”

Federal prosecutors have declined to discuss the investigations publicly.

When Adams, a Democrat, appointed David Banks as chancellor, he heralded his friend as a “visionary, leader, innovator, who has spent his career fighting on behalf of students.”

Banks founded the Eagle Academy in 2004 to educate young Black and Latino boys who he believed were often poorly served by the educational system.

Offenhartz is a general assignment reporter in the New York City bureau of The Associated Press. Sisak is an Associated Press reporter covering law enforcement and courts in New York City, including former President Donald Trump’s criminal and civil cases and problems plaguing the federal prison system.