In December 1969, the Chicago Police Department, in conjunction with the FBI, conducted a raid on the home of Black Panther Fred Hampton, in which he and Mark Clark were killed, with four of the seven other people in the apartment wounded. The survivors of the raid were all charged with assault and attempted murder. The police claimed they shot in self-defense, although a controversy arose when the Panthers, other activists and a Chicago newspaper reporter presented visual evidence, as well as the testimony of an FBI ballistics expert, showing that the sleeping Panthers were not resisting arrest and fired only one shot, as opposed to the more than one hundred the police fired into the apartment. The charges were later dropped, and the families of the dead won a $1.8 million settlement from the government. It was discovered in 1971 that Hampton had been targeted by the FBI's COINTELPRO. True to Dohrn's words, this single event, in the continuing string of public killings of black leaders of any political stripe, was the trigger that pushed a large number of Weatherman and other students who had just attended the last SDS national convention months earlier to go underground and develop its logistical support network nationally.