Andrew Koppel's May 31 death was ruled an accident. He died from acute intoxication due to the combined effects of alcohol; heroin; cocaine; diazepam, the generic form of the painkiller Valium; and Levamisole, a drug used to cut other drugs, said Ellen Borakove, a spokeswoman for the city medical examiner's office.
The 40-year-old Koppel had been out most of May 30 drinking with Russell Wimberly, a man he met at a Manhattan bar that day. He was eventually taken up to an apartment to sleep it off, said Belinda Caban, who lives in the apartment.
Caban told The Associated Press earlier this month that she and Wimberly spent the next few hours talking, and he went in to check on Koppel and said he was snoring. After six hours, she told Wimberly it was time to go and for him to take Koppel home. She said when they went to the bedroom to rouse Koppel, he wasn't moving, so they called for help. She said paramedics estimated Koppel had been dead about four hours.
Caban didn't answer her phone Friday. A phone number for Wimberly couldn't be found.
British-born Ted Koppel and his wife were not available for comment Friday, according to a representative. The family earlier issued a statement saying their son was "a brilliant, caring man, whose loss we will mourn for the rest of our lives."
Andrew Koppel's longtime girlfriend, Ilona Lieberman, did not return a message seeking comment. She had previously called his death devastating.
Koppel was appointed attorney for the city Housing Authority's civil litigation division in 2001 and resigned the post in 2008, the agency said. In 1994, while a student at Georgetown Law School, he was convicted of misdemeanor assault for striking a U.S. Senate aide during an argument at a cash machine.
Ted Koppel is the former longtime anchor of the ABC News show "Nightline," which he left in 2005. Andrew Koppel was one of his four children.