According to Waco police, officers were called to Hillcrest Hospital on Sept. 27 to investigate an assault on Lacharlesia Edwards, 21. Police said Edwards and Dunn, identified as her boyfriend, had gotten into an argument and that he punched her in the face.
"We look forward to reviewing the file and working with the district attorney's office," Dunn's attorney, Vikram Deivanayagam, said in a statement.
Bears coach Scott Drew said Dunn, a senior guard, has been indefinitely suspended from "all team activities."
Baylor said in a release that the university was working to gather facts and was fully cooperating with authorities. The school said there would be no further comment.
The woman's father, Charles Edwards, told The Associated Press from his home in Monroe, La., that his daughter didn't have a broken jaw and that "somebody down there is trying to make a story out of nothing."
The elder Edwards said his daughter was "laughing and giggling" when he went to Waco after the alleged attack. He said the couple have known each other since elementary school and have a 3-year-old son together.
"If something would have happened to my daughter, I would probably be in jail right now in Waco because I probably would have done something to that young man," said Charles Edwards, who said his daughter is in Monroe. "In this case, she said they were playing, and that's it."
Lacharlesia Edwards' attorney, Jason Darling, said his client didn't want to file charges, and that her injuries didn't warrant a felony assault charge. But he said it would be up to prosecutors to decide how to proceed.
Dunn was a second-team All-Big 12 pick while averaged 19.6 points and 4.8 rebounds last season when Baylor set a school record with 28 victories and got within one win of making its first NCAA Final Four appearance in 60 years. He set school records for points (704), 3-pointers (116) and free throw shooting percentage (85.7 on 126 of 147 free throws).
In April, two days after 6-foot-10 power forward Ekpe Udoh said he was bypassing his senior season at Baylor for the NBA draft, Dunn said he was staying. Udoh was the sixth overall pick by Golden State.
In 106 games over three seasons for Baylor, Dunn has averaged 16.4 points and already has the school record with 299 career 3-pointers, 91 shy of the Big 12 record. He is fourth in school history with 1,739 career points. He needs 451 points to surpass Terry Teagle as Baylor's career scoring leader, and 518 to pass Texas Tech's Andre Emmett for the Big 12 record.