Authorities have not provided details of the nature of the investigation involving the district, which serves more than 500,000 students, nor have they accused Carvalho of any wrongdoing.

The Los Angeles Unified School District Board of Education unanimously voted to place Carvalho on leave pending the outcome of the investigation after two days of deliberation behind closed doors. The board said in a statement that its decision was intended to minimize any disruption to its mission of teaching students.

Andres Chait, the chief of school operations, was named acting superintendent.

“Our focus remains clear: to ensure stability, continuity, and strong leadership for our students, families, and employees,” Chait said in a statement.

Carvalho became superintendent in 2022. He previously led the public schools in Miami.

Carvalho has not responded to a request for comment. The FBI on Wednesday also searched a third location near Miami. The Miami Herald reported the Florida property belonged to Debra Kerr, who previously worked with AllHere, an education technology company that had a contract with Los Angeles schools before it collapsed and its leader was indicted for fraud.

In 2024, Carvalho heavily touted a deal with AllHere for an AI chatbot named “Ed” designed to help students. But about three months after unveiling the technology and paying the company $3 million, the district dropped its dealings with AllHere, which collapsed into bankruptcy. Months later, founder Joanna Smith-Griffin was charged with securities and wire fraud, along with identity theft.

The school district said in a statement Wednesday that it “is cooperating with the investigation and we do not have further information at this time.”

Carvalho denied personal involvement in the selection of AllHere, according to the Los Angeles Times. After Smith-Griffin was indicted, Carvalho said he would appoint a task force to examine what went wrong with the LA school district’s project, but there have been no public announcements about it since.

Kerr, an education technology salesperson who connects companies with schools, said she was never paid her $630,000 commission for her work in closing the AllHere deal with the LA district, according to a news organization, The 74, that covered the company’s bankruptcy hearings in 2024.

The 74 reported that Kerr had longstanding ties with Carvalho from when he oversaw the Florida district and that her son who worked for AllHere pitched the technology to LA school leaders after he took over the helm there. The Associated Press was unable to reach Kerr for comment.

Over the past five years in Los Angeles, Carvalho has been lauded for the district’s improvements to academic performance. He won similar praise while overseeing Miami-Dade County Public Schools, Florida’s largest school district, where the national superintendents association named him Superintendent of the Year in 2014.

Spain knighted the Portugal-born administrator in 2021 for his work in expanding Spanish-language programs for Miami-Dade County schools.

Months later, Carvalho took the job in California and became a harsh critic of the Trump administration’s aggressive immigration crackdown, especially following raids in Los Angeles last year.

Carvalho arrived in Los Angeles at a critical moment, as the district found itself flush with funding from state and federal COVID-19 relief money but still struggling with the impacts of the pandemic, including learning losses and declining enrollment. He previously sparred with Florida Republican Gov. Ron DeSantis over his order that schools not require masks during the pandemic.

The Miami-Dade school system said in a statement that it was aware of the investigation involving Carvalho but did not have any comment at this time.

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Watson reported from San Diego.