The 22-year-old accused of killing Charlie Kirk is being held on suspicion of felony murder. Prosecutors expect to file formal charges ahead of his court appearance.

© Kim Raff for The New York Times

The 22-year-old accused of killing Charlie Kirk is being held on suspicion of felony murder. Prosecutors expect to file formal charges ahead of his court appearance.

© Kim Raff for The New York Times

Brent Simpson is the first police officer known to have C.T.E. He showed signs of the disease in the last few years of his life.

© Travis Dove for The New York Times

His lawyers said the man had qualified for a special visa for crime victims and has been awaiting action on his application since 2018.

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Mayor Brandon Johnson of Chicago ordered local police officers not to aid the federal crackdown, ramping up the tensions between the White House and state and local officials.

© Scott Olson/Getty Images

© Scott Olson/Getty Images