Jack Evans is stepping down as the chairman of Metro’s board when his term ends on June 30, and the transit agency’s ethics investigation into him has ended.

“I will not be seeking reelection for chair for the coming fiscal year, nor will I accept a nomination for the position,” Evans said at a board meeting on Thursday. He didn’t mention the investigation. “I have been chair for the past three-and-a-half years, and so it’s time to rotate to a different jurisdiction.”

The board launched the probe in early March, after the Washington Post revealed that Evans had sent business proposals in which he offered his experience as Metro board chair and Ward 2 councilmember to get hired in the private sector. Under the Metro Board code of ethics, members are not allowed to use their positions for personal enrichment and should “endeavor to avoid conflicts of interest or the appearance of conflicts of interest.” The board member in charge of the ethics probe, Clarence C. Crawford, told reporters after the meeting that the issue was “closed” and “resolved,” according to the Washington Post. Crawford would not say whether there was a connection between Evans’ decision and the investigation.

At the board meeting, Evans announced that a four-member committee has been appointed to propose a candidate for the next chairman. The Metro board is comprised of representatives from the three jurisdictions it serves—D.C., Maryland, and Virginia—as well as the federal government. The eight principal members will vote on Evans’ successor.

The decision comes as Evans continues to face a federal inquiry into his relationship with a digital sign company.  His colleagues on the D.C. Council and Mayor Muriel Bowser have been subpoenaed as part of that probe. He has been reprimanded by the D.C. Council for those emails in which he advertised his experience as a public official in business pitches, and some of  his responsibilities as the chair of the powerful Finance Committee were stripped.

Evans’ current tenure as Metro board chairman began after he was unanimously elected in January 2016, following two stints as chairman of the board in the 1990s. While serving as chairman this go-around, Evans had some high-profile disagreements with WMATA General Manager Paul Wiedefeld over the transit agency’s decision to curtail late-night service. On several occasions, Evans threatened to veto proposals to extend late night service cuts, but ultimately did not.

The longest-serving councilmember in D.C.’s history has made his involvement with Metro a big part of his political identity in recent years. He’s been called the “Mayor of Metro,” and had long made it his goal for the transit agency to have a dedicated funding stream (it was the only major transportation system in the United States that lacked a predictable revenue source). In 2018, that long-awaited objective became a reality, and Metro secured a total $500 million annually in funding from the District, Maryland, and Virginia.

While Evans will not remain the chairman, he has given no indication he will step down from the Metro board. He was reappointed to his four-year term at the end of 2018. However, Maryland Governor Larry Hogan is calling on Evans to resign from the Board of Directors altogether.

“Jack Evans did the right thing to step down as @wmata chairman, but he is so ethically compromised that he should resign from the board altogether,” Hogan tweeted. “That is the only way Maryland—and the entire region—can truly move forward.”

This story has been updated with additional detail.