LM Otero/Associated Press

Additional and gruesome details of Cleveland Browns quarterback Johnny Manziel's alleged incident with ex-girlfriend Colleen Crowley emerged Monday.

According to Scott Gordon of NBC 5 in Dallas-Fort Worth, Crowley's attorney, Kathy Kinser, said Manziel hit "Crowley so severely on Jan. 29 that she suffered a ruptured eardrum and still can't hear in her left ear."

Kinser also told Gordon "they expect [her ear] to heal, but it'll take a while."

Manziel signed a protective order Crowley applied for, "agreeing not to be around Crowley for two years," and agreed to pay $12,500 in attorney's fees, per Gordon.

The Dallas police announced Friday that they were investigating the alleged incident.

Gordon detailed the alleged incident and noted Crowley tried to leave a hotel room but Manziel "restrained" her from doing so. Crowley allegedly begged a valet not to let Manziel take her in his car later in the evening.

Gordon provided more details:

Manziel and Crowley drove to a nearby bar where she had earlier parked her car, she said. "I jumped out of the car and ran across the street and hid behind some bushes," she said. "He flipped a U-turn and pulled right in to where I was hiding. He grabbed me by my hair and threw me back into the car." That's when Crowley said Manziel hit her in the head on her left ear. Crowley said she tried to hit back but Manziel threw her off and she hit her head on the car window and fell on the floorboard.

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Manziel also allegedly said, "Shut up or I'll kill us both," per Gordon.

The quarterback denied the incident ever occurred to TMZ Sports.

Browns owner Jimmy Haslam talked about Manziel last week, per Ian Rapoport of NFL Media:

While football takes a backseat in situations like this, it is difficult to envision Manziel playing another snap for Cleveland. The Browns reportedly plan on cutting him in March, per Rapoport.

Cleveland may look to take a quarterback with the No. 2 overall pick in the upcoming draft or use Josh McCown as a short-term answer.

Manziel's father recently told the Dallas Morning News he feared his son wouldn't live to his 24th birthday without help (h/t CBSSports.com's Jared Dubin).

According to Gordon, Dallas police haven't released any new information since announcing the investigation Friday.