Ohio Man was on the F.B.I.’s radar for months

Although the Ohio State Highway Patrol gave a detailed account on Thursday’s police chase and standoff in which Mr. Shiffer was surrounded by officers, there were no details on the attack on the F.B.I. The building that triggered those events and its possible motives.

On Thursday, Mr. Shiffer was the only one who was hurt or killed.

Officials from the Highway Patrol and F.B.I.’s Cincinnati offices said that they did not plan to release any additional information Friday. A spokeswoman from the Ohio Attorney General’s Office stated that the Bureau of Criminal Investigation of the state was investigating the use of force in the arrest of troopers. However, she didn’t answer any other questions or provide an indication of when additional information would be available.

A spokesperson for Gov. Mike DeWine (a Republican) declined to comment.

Many in the Biden administration were similarly quiet. Merrick B. Garland, Attorney General, spoke on Thursday about the search of Mr. Trump’s house. He did not mention the Ohio attack.

A few officials condemned the attack, including Representative Brad Wenstrup (a Republican whose congressional district includes F.B.I. Cincinnati’s Cincinnati office), who called it “despicable” and Representative Mike Carey (a Republican whose congressional district includes the scene of the standoff). Mr. Carey stated that Americans do not threaten law enforcement and don’t take violence against them.

Earlier in the week, a>>> Carey called Mr. Trump’s search “a danger for the Republic” and said it had eroded faith with the Justice Department.

Senator Sherrod Brown, a Democrat from Ohio, called the Cincinnati events “an appalling attack upon law enforcement.”

“We live within a country that laws,” Brown stated in a statement. “And it’s the duty for all leaders to calm down — not stoke – political violence and extremism.”

Reporting was contributed by John Ismay, Alan Feuer, and Kevin Williams. Kitty Bennett and Kirsten Noyes contributed research.