State District Judge Fred Tinsley also lowered Brent's bond from US$500,000 to $100,000 on Tuesday. He ordered Brent not to drink alcohol or drive without a valid driver's license. Prosecutors say Brent was driving with a suspended license on the night of the Dec. 8 crash that killed friend and Cowboys practice squad member Jerry Brown.
Brent will be required to wear a monitor to detect if he has had anything to drink.
Dallas County District Attorney Craig Watkins said he agreed with Brent's attorney, George Milner, that the initial bond was set too high.
"We want to treat everyone the same," Watkins said. "Just because he's a Cowboy doesn't mean his bond should be $500,000."
Milner has protested about Brent's bond amount, which he said was higher because Brent "wears a star on his helmet."
"It was off the charts, it was inappropriate," Milner said Tuesday. "And Mr. Brent should be treated like any other citizen of Dallas County."
Brent appeared in court in a white dress shirt and jeans, with bandages covering his right hand. He did not answer questions from reporters after the hearing.
Police say Brent was speeding when his vehicle struck a curb and flipped in the Dallas suburb of Irving. Brown was taken to a Dallas hospital, where he was pronounced dead. Brent was arrested and charged with intoxicated manslaughter, which carries a maximum sentence of 20 years in prison.
A defendant with no prior felony convictions could be eligible for probation. Brent pleaded guilty three years ago to driving under the influence — a misdemeanour — while he was playing at Illinois. In the Illinois case, Brent was sentenced to 60 days in jail and two years of probation, according to court records.
Brent has been placed on the NFL reserve/non-football illness list and won't play again this season. He was on the sideline Sunday at Cowboys Stadium as Dallas beat Pittsburgh 27-24 in overtime.
Heath Harris, the first assistant district attorney, said he expected Irving police to file a case against Brent with prosecutors this week. Prosecutors hope to present their case to a grand jury before the end of this year, Harris said.