Mike Fisher, who worked at the FBI from 2013 to 2017, is believed to have been instrumental in helping investigators with their investigation of the 2016 election.
The former agent is also believed to be a person of interest in the Russia probe.
The FBI declined to comment.
Fisher’s attorneys declined to confirm or deny the reports.
Fisher, 50, served as deputy assistant director for counterterrorism in the FBI’s Washington Field Office from August to November 2017.
He was promoted to director of the Office of Intelligence and Analysis in January 2018.
Fisher had previously served as an assistant U.S. attorney for the Eastern District of Virginia from 2014 to 2019.
He is survived by his wife, Kelly Fisher, and his two sons, Joseph and William.
FBI sources told The Associated Press that Fisher has been cooperating with investigators.
They said Fisher’s lawyer did not respond to a request for comment.
Fisher is expected to be interviewed by special counsel Robert Mueller in the coming weeks.
He had worked at FBI headquarters since 2015.
Investigators were seeking to interview Fisher on Monday, after FBI Director Christopher Wray asked FBI headquarters for more information on his work.
He also told Congress on Monday that he was “looking forward to the day when I’m cleared to answer questions about my work” after a monthlong investigation.
FBI officials have said they are confident that the probe will not implicate any former or current Trump campaign officials.
The White House has repeatedly said Mueller will not investigate Trump himself.
The FBI is working to determine whether any of Trump’s associates or people associated with his campaign were involved in any of the hacking and leaks of emails, documents and other documents that have dogged the probe of the Russia campaign.