The girl, a sixth grader whose parents are immigrants from Mexico, told investigators that one of the defendants called her on Sunday, Nov. 28, during the Thanksgiving break, and asked if she wanted “to ride around,” according to four police search warrant affidavits.

That defendant, Eric B. McGowen, 19, who was on probation for burglary, and two other male teenagers picked her up at her house, and took her to a house in Precinct 20, the affidavits said. The wooded community is a hodgepodge of small houses, trailers and churches, bordered on two sides by railroad tracks and on a third by a prison. Everyone is related by blood or friendship.

The girl was taken to a blue house with white trim and a heart-shaped welcome sign — a house with a troubled history. The head of the household, Rayford T. Ellis, has a long criminal record and is a registered sex offender; one of his sons, Authur Ellis, 27, was arrested this year on murder charges. Neither man is charged in this case.

The police say a younger son, Rayford T. Ellis Jr., 19, an iron worker known as Mookie, shot and killed a teenager at the same house in August 2008. The younger Rayford Ellis was awaiting trial on manslaughter charges when he was arrested in early February on charges that he had raped the girl. (He has fathered at least five children with four young women, according to paternity suits.)

It is unclear from the affidavits if the younger Mr. Ellis was there the night of Nov. 28. But the girl said that a cousin, Timothy D. Ellis, 19, was there, and ordered her to strip, telling her that he would “have some girls beat her up” and would not drive her home if she refused, the affidavits said.

The affidavits said the girl told investigators that she then “engaged in sexual intercourse and oral sex” with several of the men present, among them Jared G. McPherson, 18, a high school basketball player, and Jared L. Cruse, also 18, who has since been charged with robbing a grocery store in the next county.

During the sexual assault, the girl said, she heard Mr. McGowen call someone on the phone and invite him to the house to have sex with her, the affidavits said. Four more men whom she did not know arrived.