Bryant had turned himself in to police on Monday after a warrant for his arrest was issued that accused him of assaulting his mother.
"The one thing I know is that Dez knows I have his back," Romo told ESPN at the American Century Celebrity Golf Championship. "Dez knows I'll be there for him. Dez knows that I'm going to stick up for him."
Bryant was accused of grabbing his mother, Angela Bryant, by the shirt and hair, hitting her in the face with his cap, striking her repeatedly in the hands and wrists, and pushing her in the chest, according to the police report.
A Class A misdemeanor family violence charge was expected to be filed by the DeSoto, Texas, police department with the Dallas County district attorney's office Friday.
Bryant, 23, faces up to a year in jail and a fine of up to $4,000. He may also be fined or suspended by the NFL under the league's personal conduct policy.
"None of us are directly involved in what's going on in his life," Romo said. "So everyone, the speculation, the articles and things that are written are just people that are guessing. And they're going to have their opinions based on it but no one knows exactly the way that Dez grew up, the way that things have shaped his life and his difficulties."
As for the golf tournament, Romo tied for fourth after shooting a 73 in the first round. He is considered a favorite to win it.
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