CNN INTERNATIONAL 2008-05-16 Bobby Kennedy assassination controversy Anchor Adrian Finighan in London New York Attorney William Pepper says a second gunman -- and not his client, Sirhan Sirhan -- shot and killed the U.S. presidential candidate, Senator Robert F. Kennedy (D-NY), in June 1968. Pepper says he'll try to obtain a new trial for Sirhan. Pepper's evidence of Sirhan's wrongful conviction incorporates a number of different things including audio recording preservation of the sounds of the actual shots fired in the Bobby Kennedy shooting. Researchers Robert J. Joling and Philip Van Praag say a recently-discovered audio tape known as the Pruszynski recording shows there was a second gunman in this second Kennedy assassination. Pepper says he's quite impressed with the findings of Van Praag and Joling.