In the 1970s, many Americans were frightened that the Warren Commission had been so single-minded and had made no effort to examine other possible hypotheses and guaranteed leads. It was further revealed that none of the commission members had had any investigative meetings and were totally dependent on Hoover and the FBI for their evidence. In any case, the Commission's biggest mistake was in dismissing key viewers whose endorsements they considered inconsistent, conflicting, or despite their solitary hypothesis as a maniacal professional killer. No one from the commission listened to the statements of the witnesses who presented themselves before the opinion. The solid statements of many witnesses, for example, were ignored. This demonstrated that their report was focused on a surprisingly specific analysis of the confirmations and reflected the effort made to decide their accuracy. Presumably such spectator confirmations remained uncertain to the Warren Commission at the time, as they simply did not bode well. As a result, Kennedy's post-mortem reports also contained numerous errors. Two tests were done on Kennedy. It was believed at the time that they would uncover the edges from which the shots had entered Kennedy's body, surely indicating where the assassin or assassins were located. The dissections actually created much more havoc, as they were totally conflicting. The primary examination was conducted at Parkland Hospital in Dallas, although the official examination was conducted at Bethesda Naval Hospital, Washington DC. When the two tests were examined, disturbing contrasts emerged. The main contrast was that the passage and entrance wounds were... center of paper... laza at the time of the shooting. According to him, no fewer than two rifles could be heard firing four shots. Furthermore, one of the shots came from a lane in front to the right of the procession. He expressed that there was half the risk that there was a second shooter in the green clearing. The HSCA brought in two other master acousticians who confirmed this and said there was indeed a 95% chance of a second shooter. For the HSCA it was an emotional affirmation of a percentage of previous testimony that the Warren Commission had chosen to ignore. A significant number of observers interviewed by the Warren Commission had witnessed hearing a rifle shot from the front of the green clearing. As a result, the HSCA was able to have a clearer picture of what happened and at the time the contribution of connivance seemed more likely.