SACRAMENTO, Calif. -- A mother has been arrested in the death of her 2-month-old child after the Sacramento County Coroner's Office found that the child had a lethal dose of methamphetamine in her system.

Maureen Hoffart, 45, was arrested Tuesday after a warrant was issued.

Investigators think the child had ingested the drug as a result of actions by her mother, Sgt. Matt Young said.

The girl was found on Jan. 1. Young said nothing suspicious was noted at the time.

Hoffart faces charges of endangering a child and causing death.