Elizabeth Anne "Beth" Rossok, 20, of Greencastle turned herself in to authorities. She is being held without bond at the Putnam County Jail pending arraignment. No arraignment date has been set.
The charges against Rossok were filed on Tuesday. According to her attorney, Todd Sallee, his client attempted to turn herself in that day, but was told a warrant for her arrest had not been issued.
The warrant was requested by the Putnam County Prosecutor's Office on Tuesday, but was not signed by a judge until Wednesday.
An investigation into possible criminal sexual activity by Rossok began on Sept. 24. The investigation was launched after the Putnam County Department of Child Services received a tip that Rossok might be having a sexual relationship with a teenage girl.
According to court records, the alleged victim told authorities she met Rossok in May of 2009, when Rossok was coaching the girl's softball team. The alleged victim said she began a romantic relationship with Rossok, and that by August 2009 they were "kissing and making out."
The relationship continued to escalate and became sexual in nature, the alleged victim told police. The girl said the last time she and Rossok had sexual contact was a couple of days before the investigation began. The alleged victim said most of her encounters with Rossok took place at Rossok's apartment.
The girl told authorities that she and Rossok used several forms of communication, including cell phone text messaging, computer instant messaging and online social networking sites such as Facebook. She also said the two had written letters to each other.
The alleged victim said her cell phone contained images of her and Rossok in romantic situations, so the phone was seized as evidence.
Police obtained a search warrant and also seized Rossok's cell phone, which court records said contained an image of a female believed to be the alleged victim lying on the floor watching television, and that the television had a pornographic image on the screen.
When police searched Rossok's apartment, Rossok's roommate said that she, the alleged victim and Rossok had watched pornographic videos together. Police also found notes written by Rossok to the alleged victim, court documents said.
The alleged victim told police that she had consumed alcohol with Rossok on several occasions. Because Rossok was not old enough to purchase alcohol, court documents said, Rossok's roommate admitted she had purchased the alcohol at Rossok's request.
According to court documents, many people, including the alleged victim's parents, had questioned the girl's relationship with Rossok.
"(The alleged victim) stated that she and Rossok had discussed the fact that Rossok could be arrested for their relationship," court records said. "(The alleged victim) stated they always told people they were just friends. (The alleged victim) denied ever confiding in anyone and telling them about the relationship."
Court records said the alleged victim had been allowed to stay overnight with Rossok, and that the alleged victim's mother often asked Rossok to help with child care.
"It was not uncommon for Rossok to pick up (the alleged victim) after school, transport her to and from practices, attend school games and on occasion put (the alleged victim) and her brothers on the school bus," court records said.
School officials were contacted, and it was confirmed that Rossok, a 2009 South Putnam High School graduate, served as a substitute teacher at Putnam County schools six times last year.