St. Charles County Sheriff's Office
St. Charles County, Mo (KSDK) -- Heroin is suspected in a double overdose that killed two people in St. Charles County.
Lt. Craig McGuire of the St. Charles County Sheriff's Department said the toxicology results won't be back for several more days, for investigators to know the exact cause of death.
A roommate found Tabitha Miller, 40 and Gary Gibbons, 38, dead at Miller's home Friday morning.
Police said they found evidence of drug use near the bodies.