There was more than just booze coursing through the veins of Ted Koppel’s son when he died in a stranger’s apartment in Washington Heights last month. According to coroners, “he died from acute intoxication due to the combined effects of alcohol; heroin; cocaine; diazepam, the generic form of Valium; and Levamisole, a drug used to cut other drugs.” It was ruled an accident. Andrew Wemberly, the stranger who befriended him and went on a drinking binge at his side, eventually taking him home to sleep it off, had said at the time: “There was a lot of alcohol. He didn’t take anything else [drugs] around me, and neither of us ate all day.” That dude’s not talking today.