A Linn County grand jury has indicted a Lebanon woman on charges of furnishing alcohol to a 14-year-old boy who died last January from "asphyxiation by drowning."

Sheriff Tim Mueller said the grand jury indicted Adrian Renee Rodriguez, 38, Thursday in connection with the death of Quentin Alexander Thacker. He had attended a party at the Rodriguez home, 1190 S. Ninth St. on Jan. 18, 2009. He was found dead in freezing weather about 120 yards south of the house in a ditch in a vacant field.

A toxicology test indicated that he had a 0.21 percent blood alcohol level, and he tested positive for marijuana.

The charges against Rodriguez involve eight other minors in addition to Thacker, the sheriff said. She was charged with nine counts of furnishing alcohol to a minor and one count of frequenting a place where controlled substances are used.

Rodriguez is in the Linn County Jail, where she has been since Oct. 13, when she was arrested on an unrelated parole violation.

Additional charges against Rodriguez and others are possible, Mueller said.

The sheriff said the investigation took a long time to complete.

"Many people at the party told conflicting stories about what happened there," he said. "Basically, people were lying, but our detectives were able to figure out exactly what happened."

Thacker was a freshman at Lebanon High School and was walking in the vacant lot when he fell face down into the drainage ditch. Neighborhood children found him later.

At first the death was called suspicious because of his age, even though there were no signs of trauma, Mueller said, and because the cause had not been determined.

Thacker's death was not the first tragedy to happen to the family. His mother was killed by her boyfriend two years before in a murder-suicide in Springfield, and his grandfather died shortly after that.