Updated

A woman and her ex-husband were charged with manslaughter after a 13-year-old was found dead of an apparent heroin overdose in the ex-husband's bathroom, police said.

Police said Frank Korondi, 13, had planned to sleep over Friday night at the Derby home of a 10-year-old friend.

At some point during the night, police said, the friend's sister, 23-year-old Angela Krasowski, picked up the boys and took them to the Shelton home of her ex-husband, James Krasowski, 32.

On Saturday morning, police received a 911 call from the home and arrived to find Frank unresponsive on the bathroom floor. He was pronounced dead at Griffin Hospital in Derby.

Police are still awaiting the results of an autopsy, but police Sgt. Kevin Ahearn said they believe Frank died of a heroin overdose. Police are uncertain whether he took the heroin himself.

"It's just mind-boggling that this occurred," Ahearn said.

The Krasowskis have both been charged with first-degree manslaughter, three counts of risk of injury to minors, possession of heroin, possession of drug paraphernalia, interfering with police and tampering with evidence.

They are being held on $500,000 bond each and are scheduled to appear in Derby Superior Court on Monday.