Wichita ? Federal prosecutors have filed charges against 12 people, accusing them of being involved in a Wichita heroin ring.

U.S. Attorney Barry Grissom said the charges are the result of a 13-month investigation.

The indictment alleges that 28-year-old Wichita resident Jermaine Ward got heroin from New York sources and sold the drug to Wichita-area buyers. The Wichita Eagle reports that an investigator’s affidavit describes undercover purchases investigators said they made last year at Ward’s apartment.

Ward is charged with one count of conspiracy to distribute heroin, 18 counts of distributing heroin and several other charges.

The federal public defender’s office, which is representing Ward, didn’t immediately return a call seeking comment early Friday.

Eleven other people, most from the Wichita area, also face charges ranging from possession to drug trafficking.