A Great Falls woman has been arrested on suspicion of negligent homicide in the overdose death of her 1-year-old grandson.
Cascade County Attorney John Parker says that Tracy Harless is scheduled to make an initial appearance in District Court on Thursday afternoon.
Court records say Riley Padilla died on July 28 of an overdose of the narcotic pain medication oxycodone that would have been fatal for an adult.
Court records say the boy's autopsy also indicated the presence of cocaine.
Harless was listed as a grandparent in Riley's obituary. Prosecutors say she was babysitting her grandson the evening of July 27, while the boy's mother went to the fair.