The station said it obtained the affidavit Monday and the Dallas Police Department has reopened its investigation.
In the affadavit, Crowley said she and Manziel argued over another woman. She said he kidnapped her, hit her, pulled her hair and smashed her phone. She also said he threatened to kill them both and added that the two had recently broke up.
She said they went to dinner at Victor Tango's restaurant in Dallas with three friends and then went to two bars before going to an "after party" at Hotel ZaZa. Their companions left Manziel and Crowley alone.
"We planned to spend the night together in his room there," Crowley said in the statement.
She wrote that Manziel threw her on the bed, which frightened her. She said she tried to leave the hotel room, but he prevented her from doing so and he led her down a back stairway. She asked a valet to help her.
According to her affidavit, the valet replied, "I don't know what to do," and allowed Manziel to "literally throw me in the front passenger seat."
The Dallas Morning News reported Crowley tried to jump out of the car and hide in some bushes but he found her "and grabbed her by the hair, throwing her into the car."
"He hit me with his open hand on my left ear for jumping out of the car," she wrote in her affadavit. "I realized immediately that I could not hear out of that ear, and I still cannot today."
She said she struck Manziel several times in an effort to get out of the car, but Manziel threw her off, cauing her to strike her head against the car window. She fell on the floor but Manziel pulled her back up. He refused to let her have her phone, she wrote.
He drove toward her apartment in Fort Worth.
"I was crying and telling him, 'I hate you! Just leave me alone! I hate you!'" she wrote.
Manziel told her he planned to drop her off, take her car and "go kill himself," Crowley said in court records. "She was worried he was on drugs or having a 'psychotic break,' so she started trying to calm him down by saying 'I love you,' she wrote. 'We can figure this out, we can talk,'" The Dallas Morning News reported.
In response, he started laughing. She became scared and cried more, which he stopped by allegedly telling her, "Shut up or I'll kill us both!"
"Then I started begging him not to kill me and he immediately responded, 'I would never kill you. You don't deserve that. I would only kill myself!' He was not making sense," Crowley wrote.
They continued arguing at Crowley's apartment. She kept asking for her phone but Manziel refused to hand it over, telling her that she "wasn't going to be talking to anyone right then," she wrote.
"He then smashed my phone onto the tile in the apartment entry," she said.
Determined to get some help, she tried to FaceTime her parents on her computer as Manziel was outside the apartment pacing. When he went back inside he asked if she had FaceTimed her parents.
She denied it and he told her that she "had better not by lying to him." He saw she had tried to get in touch with her parents when he went over to her computer, she wrote.
"I became extremely scared as to what he might do," she wrote. "I was in my kitchen so out of fear for my life, I pulled a knife out of my knife block and advanced toward him."
Manziel ran out of the apartment and she threw down the knife, checking to make sure he was gone. When she saw he was in the parking lot she banged on her neighbor's door for help, she wrote.
"I continue to be extremely concerned for my health and well-being," she wrote.
Manziel's father recently said he was afraid his son would not live to see his next birthday and that the quarterback twice declined to enter a rebab center last week.
Super Bowl MVP Von Miller, a former Aggie standout who was suspended from the NFL two years ago, and actor Charlie Sheen, who has battled addiction for years, both posted messages to Manziel over the weekend.