Complex sentence: He agreed to testify against Buchalter as one of several witnesses on behalf of District Attorney Thomas E. Dewey but was murdered with Louis Cohen on January 28,1939 before his court appearance.
Split into simpler sentences: He agreed to testify against Buchalter as one of several witnesses on behalf of District Attorney Thomas E. Dewey. He was murdered with Louis Cohen on January 28,1939 shortly before his court appearance.