Roper, 35, was charged with one count of death by auto and four counts of assault by auto after he reportedly "failed to observe slow-moving traffic ahead" and "swerved to try and avoid" Morgan's Mercedes limo at the last minute, forcing it to overturn, authorities said after the incident.
In addition to pleading not guilty to the charges, TMZ reports that Roper claims Saturday's events were an accident and that he is a "scapegoat" in the case because a celebrity was involved.
Morgan's limo-bus, two tractor-trailers, two cars and an SUV were involved in Saturday's incident in New Jersey. The actor's longtime comedy writer, James McNair was killed in the accident.
Notable deaths of 2014 [PHOTOS]