Follow CBSMIAMI.COM: Facebook | Twitter

MIAMI (AP) — Prosecutors say a Pennsylvania mother killed her 11-week-old son with a lethal mix of drugs in her breast milk.

READ MORE: Breaking Overnight: Investigation Underway After Shots Fired At Officers In North Miami Beach

Samantha Jones was charged Friday with criminal homicide in the April 2 death of her baby.

The Bucks County District Attorney’s office says an autopsy found the baby died from a combination of methadone, amphetamine, and methamphetamine.

According to an affidavit, the 30-year-old told police she’d been too tired to make the baby a bottle when he awoke crying and instead breastfed him.

READ MORE: Spook-Free Halloween Safety Tips For Your Pets

A few hours later, the baby was pale and had bloody mucous coming from his nose. He died at a hospital.

Jones told police that she had been prescribed methadone because of a painkiller addiction.

A message seeking comment from her lawyer wasn’t immediately returned Monday.

MORE NEWS: CBS4 Exclusive: Former Broward Sheriff Scott Israel Calls Scot Peterson's Press Conference On His Deposition 'Fictional'

(© Copyright 2018 The Associated Press. All Rights Reserved. This material may not be published, broadcast, rewritten or redistributed.)