PARIS — Police Wednesday afternoon announced charges against four people in connection to their roles in trafficking heroin in Oxford County in a case related to the overdose death of an 18-year-old Harrison woman in September 2015.

In addition to the arrests announced by the Maine Drug Enforcement Agency, about 800 doses of heroin were also seized, police said.

Arrested and charged were:

• Jacolby Morrison, 18, of Norway, aggravated trafficking in schedule W drugs (heroin) Class A and violation of administrative release Class D;

• Jonathan Keefe, 27, of Wakefield, Mass., aggravated trafficking in schedule W drugs (heroin) Class A;

• Laurie Jones, 52, of Norway, unlawful possession of schedule W drugs (heroin) Class C; and

• Jared Jones, 22, of Norway, unlawful possession of schedule W drugs (heroin) Class C.

Steve McCausland, spokesman for the Maine Department of Public Safety, said the investigation began after the heroin-related overdose death of 18-year-old Cassidy Patten of Harrison.

On Sept. 12, Patten died in Lewiston. Authorities said she died of acute intoxication of a combination of heroin and morphine.

Shortly after her death, Matt Cashman, supervisor of the Maine Drug Enforcement Agency’s Western District Task Force, said Patten’s relatively young age coupled with the fact that the people she was with had dropped her off at the emergency room and left without identifying themselves were red flags for investigators.

McCausland said that “over the past eight months, investigators identified several people suspected of distributing heroin in the county who were associates of the victim.”

Earlier this year, undercover agents made purchases of heroin from Morrison, authorities said. He was subsequently arrested and charged with trafficking heroin and was released on bail at the time.

On Tuesday, McCausland said the MDEA, along with officers from the Paris, Oxford and Norway police departments and the Maine State Police contributed to the investigation and to the search of an apartment at 235 High St. in Paris.

The apartment, rented to Laurie Jones, was a “suspected location used to distribute heroin by Morrison and Keefe,” McCausland said.

McCausland said Morrison and Keefe routinely traveled to Massachusetts to purchase heroin that was later distributed in Maine.

While searching the apartment, law enforcement officers seized 80 grams, or 800 doses, of heroin, with an approximate street value of $12,000, as well as scales, packaging materials and $1,600 of suspected drug money, according to McCausland.

Morrison and Keefe were transported to the Oxford County Jail. No bail was allowed for Morrison, while Keefe’s bail was set at $25,000 cash.

Laurie Jones and her son, Jared Jones, who were transported to the Oxford County Jail, had bail set at $500 each. 

In 2012, Laurie Jones was convicted of misdemeanor disorderly conduct and sentenced to serve 24 hours in jail, with all time suspended, according to the State Bureau of Identification. She was convicted of misdemeanor operating under the influence in 2002 and fined $700.

Keefe was convicted of theft by unauthorized taking in 2015 and fined $100.

Morrison and Jared Jones have no prior criminal record.

McCausland said MDEA agents will continue to work on the case and the aftermath of the death.