During his successful career, Marvin has represented a number of high-profile cases and has tried in excess of 150 cases to verdict. He has represented clients in more than 80 murder cases and tried approximately 50 homicide trials to verdict.

• Composure in the face of emotional media exposure: of particular note is Marvin's successful representation of a 63 year-old grandmother, Herminia Albo, who was falsely accused of child abuse in an 8 week media barrage. Marvin brought Ms. Albo to the Grand Jury and successfully presented her case in the face of adverse political, prosecutorial, and media pressure. Her case was dismissed.
• Integrity in cases of discrimination: Marvin represented school teacher Gary Ranum in Westchester County. Mr. Ranum was falsely accused of child abuse as a result of his politically incorrect alternative lifestyle. Marvin successfully perfected Mr. Ranum's appeal and retired the case to an acquittal in the face of mounting media pressure against his client in Westchester.
• Courage in politically-charged situations: during the New York City corruption investigation of 1986 and 1987, Marvin successfully represented a commissioner in the Koch administration; using his legal talent and expertise to assure that his client, a practicing lawyer, would not face the shame and embarrassment of a groundless political indictment or disciplinary action.
• Expertise with sensitive criminal and disciplinary matters: Marvin represented an acting supreme court judge in both criminal an disciplinary actions. The judge was found not guilty, and the disciplinary matter was resolved successfully.
• In 2000 Marvin represented an NYC administrator with the Board of Education on charges of voting fraud, forgery and conspiracy. After the acquittal Mr. Raskin's client was fully restored to his position at the Board of Education.
• In 2003 Marvin defended a ground zero supervisor at the WTC construction site. His client came to the defense of an innocent victim of police brutality and then was beaten and arrested for his efforts. Marvin's client was found not guilty by a jury in Manhattan.

Marvin has represented judges throughout the State of New York in both criminal and disciplinary proceedings.