Last year, the National College Health Assessment found that more than 10 percent of women said they had been the victim of some form of sexual assault on campus in the previous 12 months. Although it's unknown how many instances of campus sexual assault involve athletes, "Outside the Lines" research of media coverage found at least 30 Division I schools had such reports in the past five years. These cases, because of their publicity, are often the ones by which the system -- the university and law enforcement -- is judged for how such reports are handled. There are plenty to judge, too, with recent reports of athletes allegedly raping or assaulting women at Oregon, UCLA, Texas, Vanderbilt, Connecticut, Mississippi, and Florida State, which is being investigated for its handling of sexual assault allegations against Heisman Trophy winner Jameis Winston.

Catherine Lhamon, the U.S. Department of Education's assistant secretary of the Office for Civil Rights, said the Missouri, Southern Idaho and Tulsa cases are representative of many the department has seen in recent years.

Without commenting specifically about the schools, she said: "That fact pattern is enormously distressing to me, that people are coming forward saying that there's something wrong, that shouldn't have happened, and that the school says that, 'We can't handle that."

At Missouri, the final count was four -- one alleged rape, one alleged physical assault, one sexual assault and one domestic assault -- before one of its star athletes left campus in 2010.

The first incident came in October 2008, when a sophomore at Missouri reported that running back Derrick Washington raped her in her dorm room.

The second came in May 2010, when a women's soccer player said Washington punched her at a bar.

The third came in June 2010, when a 2009 Missouri graduate and former athletic department tutor reported that Washington -- who was at her apartment to have sex with her roommate -- crept into her bedroom in the middle of the night and sexually assaulted her.

And the last came three months later, when Washington was arrested for beating up his ex-girlfriend.

Washington's involvement with police began in 2008, when a student accused him of rape.

"He grabbed both my wrists with one hand and kept doing [sic] and just proceeded to put his penis inside of me," the woman told "Outside the Lines" about the 2008 incident. "When I was finally able to push him off me, he just kept saying that if I said anything they would kick him off the football team. And football was his life, so if I said anything, he would kill me and kill himself."

After their investigation, campus police sent a warrant request to Boone County assistant prosecuting attorney Andrew Scholz, but he ultimately declined to press charges against Washington. Instead, Scholz entered into an agreement with Washington that he wouldn't be charged as long as he never contacted the woman and took rape awareness classes. Scholz, who left Boone County in 2010 and is in private practice, said there were a number of issues that came up in interviewing witnesses that would weaken the woman's case, including a comment made to her by her ex-boyfriend that she could use the incident as leverage to get a full-ride scholarship.

University officials knew of her rape allegation, though, and under federal law should have begun an investigation, no matter what authorities did. The woman said she told her academic adviser, who acknowledged in a phone conversation with "Outside the Lines" that she had a conversation with her about the rape. But the adviser said the woman didn't tell her it had been Washington.

Washington's parents told "Outside the Lines" that assistant football coaches met with them to talk about the incident and indicated to them that criminal charges likely wouldn't be filed.

The coaches and adviser fit the definition of "mandatory reporters" under Title IX, meaning someone obligated to report the incident to initiate a Title IX investigation. At that point, the university would have been required to open a Title IX investigation -- the purpose and conduct of which are different from a criminal investigation. The standard of proof needed for action also differs from criminal investigations; although a criminal case requires "proof beyond a reasonable doubt" for a finding of guilt, a Title IX case, much like a civil court case, needs only a "preponderance of evidence."

But the woman said no one from the university reached out to her to offer assistance or interview her as part of a Title IX or student disciplinary investigation, part of which the law says should include an assessment of the alleged victim's needs in order to feel safe on campus and able to continue her education.

"I stayed in my dorm room with the doors locked. ... I don't think I went to class for weeks or maybe even a month," she said.

Recently, the woman asked the university what had been done about her allegations and a university official told her the school had no disciplinary records responsive to her request. This week, the school confirmed to "Outside the Lines" that a Title IX investigation never occurred.

Washington played every game that season and scored 19 touchdowns, leading his team in rushing. The woman said she had to seek therapy, and medical records confirm she was diagnosed with post-traumatic stress disorder.

"I've lost the majority of my faith in humanity," she said. "I lost my self-worth. I was put on antidepressants, anti-anxiety medicine. I have nightmares."

Washington, through his parents, declined to speak to "Outside the Lines" for this story. In 2009, he led the team in rushing again and, in spring 2010, was projected to be one of the best running backs in the Big 12.

Teresa Braeckel, center, followed in father Joe's footsteps by attending Missouri. Teresa Braeckel

After the spring practice season concluded, a Missouri women's soccer player got into a fight with Washington's girlfriend at a bar in Columbia on May 6, 2010. Police arrested and cited both women for fighting. The soccer player told police that, during the fight, Washington walked up and "struck her with a closed fist on the left side of her face."

While at the hospital being treated for the injury to her face, she told police she wanted to press charges against Washington, and a warrant was issued for third-degree assault. But later that day, she came to the police department and said she had changed her mind.

According to the police report, the woman spoke to her soccer coach, who said her scholarship might be in danger because of her arrest. The report stated, "Her coach made her feel as though she would not have any problems with her scholarship if she declined to prosecute Derrick Washington for assaulting her," and that, "If Mr. Washington was arrested, the incident would make the news and the situation with her scholarship might change."

Police closed the case and didn't arrest Washington, whose status with the university and team remained the same. The soccer player, who did not want her name published, said she was never contacted by university officials about the incident. She wrote in an email to "Outside the Lines" that she did lose her scholarship but, with the help of an attorney, was able to have it reinstated.

Just six weeks later, another woman would accuse Washington of sexually assaulting her. She said she was asleep in her bed when Washington came in and put his finger in her vagina. Teresa Braeckel reported the incident to police nearly immediately, and police opened an investigation.

While police were investigating, Washington was named one of four captains of the football team and sent to Dallas to represent the school at Big 12 media days.

In this case, Missouri's Office of Student Conduct did reach out to Braeckel, but she told officials she was concerned that discussing the case could interfere with her criminal case proceedings.

When felony charges were imminent, football coach Gary Pinkel suspended Washington from the team, but he remained on scholarship and on campus. Washington was charged with felony deviate sexual assault on Aug. 30, 2010.

Thirteen days later, while Washington was out on bail, police arrested him again. This time it was for beating up his former girlfriend, who told police that Washington struck her in the face multiple times after they got into an argument at her apartment.

An officer wrote in a report that the woman had some hemorrhaging around her left eye, consistent with her report that Washington had tried to "push her eyeballs into her skull."

Washington withdrew from the university and moved home to live with his parents near Kansas City, Missouri.