"This was not an act of vengeance, it was not an act of desperation or anything else," said Dennis Morgan, "it was just stupidity."

That's the only way he can explain why his son died.

Ryan Morgan was 17 and his friend Cory Carlson was 19. On April 23, they were hanging out together at Ryan's Bellingham home.

Ryan's parents, Dennis and Stephanie, found the young men dead the next morning.

Dextromethorphan killed the boys. It's known as Dex, and a small amount of it is found in cold medicine. But when you mix a large amount of Dex with alcohol or marijuana it can cause sudden death.

Doctors say teens are taking it because they get a "high" with mild hallucinations.

Cory and Ryan bought a concentrated form of Dex from an Indiana company, Chemical API, over the Internet.

"I'm declaring all out war on Chemical API and anyone else who sells this crap on the Internet," said Dennis.

"Our investigation of the deaths in Bellingham revealed that other young people in the Bellingham area have been using the drug quite commonly," explained Whatcom County Sheriff Bill Elfo.

In Whatcom County four kids have overdosed on Dex recently, and three -- including Cory and Ryan -- have died.

The Sheriff said kids think it's safe because it's used in cold medicine. Dex is not safe, it is deadly.

"Parents (need to) push back and don't let them get away with it," urged Dennis. "It's better that they hate you the rest of their life rather than have to go through what we went through."

The U.S. Attorney's office is deciding whether to file charges against the owners of the Indiana company that sold Ryan and Cory Dex.

Ryan's parents are sharing their grief because they worry that kids still think Dex is safe, and that other parents don't even know what it is.