Gross isn't only a major anti-gun promoter, he's also a big Mumia Abu Jamal supporter. You might have caught him and Ed Assner on one of the news magazine shows confronted with pretty serious evidence that Mumia is the murder that the courts have already decided he is (despite his current "Faulkner was a mob hit and I was set up for the fall" defense that his original lawyer was too embarrased to present a cpouple years back when he made that story up).
Desopite the evidence, the two of them just kept backpedaling. They seem to believe that it's just OK that he killed the cop. Everything that points to his guilt is just the figment of imagination of the police, the DA, the jury, and the redneck white folk of Philadelphia.
Watch it if it turns up on late night TV. Don't buy it if it puts any money in the pocket of this loser.