The shooter who assassinated conservative activist Charlie Kirk and then vanished off a roof and into the woods is still at large more than 24 hours later. Federal investigators appealed Thursday for the public’s help by releasing photos of the person they believe is responsible. Investigators obtained clues, including a palm print, a shoe impression and a high-powered hunting rifle found in a wooded area along the path the shooter fled. But they had yet to name a suspect or cite a motive in the killing. They were treating it as the latest act of political violence to convulse the United States across the ideological spectrum. Utah's governor pleaded for the public’s help in the search for the shooter.

Officials have released a new video of a person of interest in the assassination of conservative activist Charlie Kirk at a college event in Orem, Utah. Gov. Spencer Cox asked the public for help identifying them at a Thursday night news conference. Cox says the FBI has received more than 7,000 leads and tips so far. The surveillance video showed a person running across a roof, climbing off the edge and dropping to the ground. Officials say the suspect is believed to have fled into a neighborhood after firing one shot and has not yet been identified. The threat of political violence in the United States has escalated in recent years and cuts across the ideological spectrum.

President Donald Trump attended the New York Yankees victory over the Detroit Tigers in the Bronx, drawing mixed reactions from the crowd. The visit marks the 24th anniversary of the Sept. 11 attacks. Earlier in the day, Trump honored victims at the Pentagon. Security was heightened at the stadium, with metal detectors and Secret Service agents present at every entrance. Trump greeted players before the game and predicted a Yankees win, recalling past games with late owner George Steinbrenner. Trump, who was born in Queens, has attended a series of major sporting events since returning to the White House in January.

Americans have marked 24 years since the Sept. 11, 2001, attacks with solemn ceremonies, volunteer work and other tributes honoring the victims. At the World Trade Center site in New York City, the nearly 3,000 victims’ names were read aloud Thursday. At the Pentagon in Virginia, a memorial service honored the 184 service members and civilians killed. And near Shanksville, Pennsylvania, a similar ceremony honored the victims of Flight 93. The remembrances are often promoted as a day of national unity, but this year's anniversary comes during a time of increased political tensions just a day after conservative activist Charlie Kirk was shot and killed.

Former MSNBC analyst Matthew Dowd opened a floodgate of people who faced consequences for statements in the media — social or otherwise — in the wake of conservative activist Charlie Kirk's assassination. Dowd lost his job after commentary in which he said “hateful words” lead to “hateful actions." He and MSNBC's president apologized. But the list of others quickly grew long, some through instances that came to light in a campaign to shame launched by right-wing activists. College educators in Mississippi and Tennessee were fired. A Florida political reporter was suspended and CBS News' Nate Burleson faced heat for a question. The feminist website Jezebel took down a satirical piece — published two days before Kirk's death — that called on witches to put a curse on him.

President Donald Trump and first lady Melania Trump have marked 24 years since the Sept. 11, 2001, attacks at a service at the Pentagon. While traditionally observed near the building’s memorial outside the Pentagon’s walls, it was moved Thursday to the internal courtyard because of security concerns. The 9/11 remembrances are being held during a time of increased political tensions after conservative activist Charlie Kirk was shot and killed while speaking at a college in Utah.

Security experts are questioning the protection provided to Charlie Kirk at the Utah college where he was fatally shot. The shooting happened Wednesday during an outdoor event at Utah Valley University. Campus police chief Jeff Long said six officers staffed the event and coordinated with Kirk’s security team. While the gunman remained at large Thursday, experts criticized the lack of perimeter security and the decision to hold the event outdoors. Utah allows concealed carry on campuses, complicating security efforts. The shooter fired from a rooftop, which raised concerns about securing elevated areas at such events.