OLYMPIA, Wash. -

A Lacey woman has been charged with manslaughter in connection with the death of her 1-year-old grandson who died of a methadone overdose.

The Olympian reports the charges filed in Thurston County Superior Court Tuesday say 54-year-old Tami Roughton is a heroin dealer who had access to methadone.

Her grandson, Joe-Joe White, was pronounced dead in November 2012 by medics called to her Lacey home. The coroner says toxicology tests showed he had a lethal dose of methadone in his blood, but it's unknown how he ingested it.