A 12th Warren County resident was arrested Tuesday on drug charges as part of a yearlong investigation by the Drug Enforcement Administration and the Warren County Sheriff’s Department.

Sean Calvary, 31, 230 Clark Road, was picked up in Washington County on a warrant Tuesday and booked into the Warren County Jail at 2:15 p.m., jail records show. The other 11 were arrested June 13 on numerous charges related to fraudulent acquisition and distribution of prescription medications.

Calvary was charged with three counts of obtaining controlled substances by fraud. No bond was set. An initial hearing was expected today.

The specific drug with which Calvary’s charges are associated was not available. Others arrested face charges associated with oxycodone and hydrocodone, both classified by the federal government as Schedule II or III controlled medications. Another was charged with selling Xanax, a Schedule IV substance.

Illegal diversion, use and sale of prescription drugs is a faster-growing issue for law enforcement than methamphetamine and cocaine, Sheriff Martin Pace said after the first batch of arrests.

All of the 11 have posted bond and been released. They are:

• Colum Woodson, 32, 2625 Alma St. — five counts of obtaining controlled substance by fraud; $10,000 bond

• Teresa Burchfield, 52, 1865 Ring Road — four counts of obtaining controlled substance by fraud; $8,000

• Dianna Hodges, 24, 187 Grange Hall Road — sale of a controlled substance (hydrocodone); $7,500

• Dawn Burroughs, 57, 1309 River Bend Cove — five counts of obtaining controlled substance by fraud; $10,000

• Allison Launius, 30, 2649 Oak Ridge Road, Lot 1 — sale of a controlled substance (hydrocodone); $7,500

• Albert Benson, 60, 915 Locust St. — five counts of obtaining controlled substance by fraud; $10,000

• Joel Wright, 56, 1216 Bonelli St. — five counts of obtaining controlled substance by fraud; $10,000

• Tim Buford, 51, 5615 Jeff Davis Road — two counts of obtaining controlled substance by fraud; $4,000

• Christine Hicks, 42, 1512 Ethel St. — five counts of obtaining controlled substance by fraud; $10,000

• Minor Ray, 50, 801 Clay St., Apt. 3E — five counts of obtaining controlled substance by fraud; $10,000

• Chasty Moore, 22, 1245 Mount Alban Road, Lot 6 — one count of sale of Xanax, $7,500; one count of conspiracy to distribute a controlled substance, $1,500.