A mother and two other people were charged with third-degree murder Thursday in the overdose death in January of a 3-year-old child, state police announced.

The case began about 9 p.m. Jan. 6 when state police in Chambersburg were sent to 43 W. Baltimore St., Unit B, in Greencastle, Franklin County, where they found the dead girl, Logan Starliper.

An investigation determined that the child died "due to mixed substance toxicity." She had methamphetamine and buprenorphine in her system, state police said. She had last been seen alive the night before, at about 10:30 p.m.

When she died, the child was in the care of her mother, Brittany Higgins and her mother's boyfriend, Brian Bennett, police said. The police investigation concluded that Higgins and Bennett had been using methamphetamine on Jan. 5 that they purchased from Rodney "Allen" Mower, police said. They also had suboxone and subutex in their possession, police said.

"The death of this sweet, innocent little girl is the most heartbreaking example of the danger the overdose epidemic has brought to our community and region," Franklin County District Attorney Matthew Fogal said in a news release.

Higgins and Bennett, both 29, are charged with third-degree murder, drug delivery resulting in death, involuntary manslaughter, endangering the welfare of children (2 counts) and the controlled substance, drug, device and cosmetic act.

Mower, 43, of Fayetteville, was charged with drug delivery resulting in death.