Nina Rhodes-Hughes insists Sirhan was not the only gunman firing shots when Sen. Kennedy was murdered only a few feet away from her at a Los Angeles hotel. She says there were two guns firing from separate positions and that authorities altered her account of the crime.
In his analysis of the Pruszynski recording, Philip Van Praag found that some of the 13 shot sounds he located in the tape were fired too rapidly, at intervals too close together, for all of the shots fired in the pantry to have come from Sirhan's Iver Johnson revolver alone.
http://edition.cnn.com/2012/07/08/justice/california-rfk-second-gun/index.html?c=&page=1
If its proven there was poor investigate work or worse a cover up here, this will reignite interest in the JFK assassination, the official account of which still seems suspicious to me given the magic bullet and Oswald being rubbed out by an organized crime figure before he could talk.