Robert Platshorn

Robert Platshorn. Producer: Should Grandma Smoke Pot?. Robert Platshorn, aka "The Tuna" is a Television Producer and author of the Black Tuna Diaries. He is America's longest imprisoned (30 years) nonviolent marijuana offender. "The Square Grouper" movie inspired by Robert Platshorn's memoir, Black Tuna Diaries, tells his fascinating story. Robert and most of the surviving Black Tunas are featured in this full length feature documentary. Raised on South Street in...