Dozens of people gathered today at the location where Chicago police raided a West Side two-flat 50 years ago, shooting and killing Black Panther Party leaders Fred Hampton and Mark Clark.

David F. Walker of Portland is the author of "The Black Panther Party: ... indicate high-level FBI involvement in the 1969 Chicago killings of two Black Panthers, Fred Hampton and Mark Clark). ...

On Dec. 4, 1969, Chicago police killed two members of the Black Panthers -- Mark Clark and Fred Hampton -- in what officials described as a gun fight.