Eugene Twardowicz; Investigator Built Case Against Agnew

Eugene Twardowicz, 55, the federal investigator whose efforts brought down Vice President Spiro T. Agnew and Maryland Gov. Marvin Mandel. Twardowicz had worked for the criminal investigation and intelligence divisions of the Internal Revenue Service in Maryland from 1961 to 1977 and was chief investigator for the U.S. attorney’s office in Baltimore from 1978 until his retirement in 1987. He found evidence that led to Agnew’s pleading no contest to income tax evasion and resigning as vice president in 1973. Twardowicz also found the incriminating letter that supported Mandel’s 1977 conviction for mail fraud and racketeering. On Wednesday in Baltimore of an apparent stroke.