Probably not. The NYPD cleared 75 homicides and disappearances by attributing them to the DeMeo crew (and that was all of them combined, not just Roy).

The 200 figure seems to come from the hyperbole of Artie Ruffels, who for some reason tries to make DeMeo sound even deadlier than he was (apparently 75 murders isn't enough ). In one interview, Ruffels claims the crew killed THREE hundred people. GTFOH Artie!