St. Louis resident Kelly O’Connell says her son died because whomever was with him was too afraid to call police when her son overdosed.
Investigators say John Faupel left his boy in the car with heroin and paraphernalia while he went into the Arch Budget Hotel to sell $80 worth to a police informant.
Thomas Lucas Jr. and Whitney Patrick, both 23, were charged after a grand jury indictment.
Authorities say Adams and Moss sold $100 worth of heroin last Aug. 20 to Leonard Hormann III of Alton. Hormann died that day.
Police say all robberies were within a mile and a half radius in south St. Louis.
Getting addicts to turn on their dealers and warning teens are just a couple of tactics that officials believe have had an impact.
The number of overdose deaths is at 19 and climbing, compared with just ten last decade.
Investigators say the pair traded the goods for heroin in St. Louis.
Police found the bodies of 40-year-old Tabitha Miller and 38-year-old Gary Gibbons on Friday.
The indictment announced Wednesday accuses the suspects of a distribution conspiracy that began in 2009.