A Carbon County man is in jail on charges that he sold heroin that resulted in a fatal drug overdose.

Francisco Aponte Jr., 26, of Nesquehoning, was charged by Lansford police with delivery of a controlled substance and criminal use of a communication facility.According to the affidavit filed by investigator Charles Horvath of the Lansford Police Department:At 12:44 p.m. May 9, Lansford police were dispatched for a possible drug overdose.They found Brian Kieffer dead on the floor in his second-floor bedroom.Horvath inspected the bedroom, and found three empty blue glassine bags commonly used to package individual doses of heroin on the nightstand closet next to the bedroom's door. A cotton swab was found on the nightstand. A black HTC cellphone and a black rubber band commonly used to bind bundles of heroin were found on the bed.On May 11, Lansford Police Chief Jack Soberick and Horvath met with a person who indicated Aponte was selling heroin and was living with Kayla Leibowitz in Lansford.The person provided Horvath with a phone number for Aponte, and also received information from several other sources that Aponte and Leibowitz were selling heroin.In July and August, Jim Thorpe police conducted an undercover heroin investigation in Nesquehoning that involved Aponte and Leibowitz.On May 16, Horvath obtained a search warrant for Kieffer's HTC phone, and found text messages on it, including one from a contact named "Frankie" that occurred between 10:08 and 10:31 p.m. May 8.The texts were associated with illegal drug activity. A search of Kieffer's phone also revealed Facebook Messenger messages between Kieffer and Leibowtiz.Kieffer's autopsy and toxicology reports showed he had ethanol, fentanyl and morphine in his blood.On Sept. 12, Horvath interviewed Leibowitz at Schuylkill County Prison, where she was incarcerated on a bail violation, and showed her the text and Facebook Messenger exchanges.Leibowitz claimed that she and Aponte sold heroin to Kieffer on a regular basis, but she refused to deal with him on a personal basis because she did not trust him, and that she and Aponte would normally sell three bags of heroin for $20. She said that they had sold blue glassine bags of heroin that were not stamped.On Sept. 14, Soberick took Aponte into custody for possession of drug paraphernalia during an unrelated incident and questioned Aponte about Kieffer's overdose death. Aponte admitted to selling heroin to Kieffer, but said he could not remember if he sold to him on May 8.He is jailed for the drug paraphernalia incident after Magisterial District Judge Eric Schrantz of Jim Thorpe set bail at $10,000 straight.In a separate case, Aponte has also been charged for possession of a controlled substance.For that case, he was arraigned Sept. 19 by District Judge Casimir Kosciolek of Lansford, who set bail at $5,000.