CBS News Chicago witnessed the man being tackled by law enforcement and removed from the courthouse lobby on a stretcher.

CHICAGO (WLS) -- A standoff at the Dirksen Federal Building downtown Chicago ended after roughly nine hours Tuesday night.

The Dirksen Federal Building in downtown Chicago was on lockdown Tuesday morning, according to the Federal Bureau of ...

The building was placed on lockdown shortly after 11 a.m., the FBI confirmed. The U.S. Marshals said a man armed with a knife ...

The FBI and other law enforcement personnel responded to a man in the Dirksen lobby who walked into the courthouse armed with ...

A 38-year-old man is facing a felony charge after allegedly threatening to harm himself with a knife during a lengthy ...

Experts are praising efforts of officers to bring the Tuesday barricade situation at the Dirksen Federal Building to an end ...

The Dirksen Federal Building and its surrounding streets are back open Wednesday morning after a knife-wielding man entered ...

Following a nine-hour standoff at the Dirksen Federal Building, a knife-wielding man — who prompted a lockdown and evacuation ...

A Chicago man is charged with pulling a knife in the lobby of the Dirksen U.S. Courthouse, leading to a 9-hour standoff.

The Dirksen Federal Building in downtown Chicago is on lockdown, the FBI said.

An FBI affidavit alleges that Mario Santoyo, 38, refused to follow law enforcement's commands when told to put down a knife ...